Peptide microarray

<h2 id="principle">Principle</h2>
The assay principle of peptide microarrays is similar to an <a href="/facts/ELISA/8yvpYDtH">ELISA</a> protocol.
The peptides (up to tens of thousands in several copies) are linked to the surface of a glass chip typically the size and shape of a microscope slide. This peptide chip can directly be incubated with a variety of different biological samples like purified enzymes or <a href="/facts/Antibody/MX8pdTdP">antibodies</a>, <a href="/facts/Antiserum/zt7McfLV">patient or animal sera</a>, <a href="/facts/Lysis/th8pXeEn">cell lysates</a> and then be detected through a label-dependent fashion, for example, by a primary antibody that targets the bound protein or modified substrates. After several washing steps a secondary antibody with the needed specificity (e.g. anti IgG human/mouse or anti phosphotyrosine or anti myc) is applied. Usually, the secondary antibody is tagged by a fluorescence label that can be detected by a fluorescence scanner.<a class="footnote-ref" id="fnref:1" href="#fn:1">1</a> Other label-dependent detection methods includes chemiluminescence, colorimetric or autoradiography.
Label-dependent assays are rapid and convenient to perform, but risk giving rise to false positive and negative results.<a class="footnote-ref" id="fnref:2" href="#fn:2">2</a> More recently, label-free detection including <a href="/facts/Surface_plasmon_resonance/8JKldMUT">surface plasmon resonance</a> (SPR) spectroscopy, <a href="/facts/Mass_spectrometry/RH5WBHJ2">mass spectrometry</a> (MS) and many other optical biosensors<a class="footnote-ref" id="fnref:3" href="#fn:3">3</a><a class="footnote-ref" id="fnref:4" href="#fn:4">4</a><a class="footnote-ref" id="fnref:5" href="#fn:5">5</a><a class="footnote-ref" id="fnref:6" href="#fn:6">6</a> have been employed to measuring a broad range of enzyme activities.<a class="footnote-ref" id="fnref:7" href="#fn:7">7</a>
Peptide microarrays show several advantages over <a href="/facts/Protein_microarray/3L2zNnVR">protein microarrays</a>:

<ul><li>Ease and cost of synthesis</li>
<li>Extended shelf stability</li>
<li>Detection of binding events on epitope level, enabling study of i.e. epitope spreading</li>
<li>Flexible design for peptide sequence (i.e. posttranslational modifications, sequence diversity, non-natural amino acids ...) and immobilization chemistries</li>
<li>Higher batch-to-batch reproducibility</li></ul>
<h2 id="production-of-a-peptide-microarray">Production of a peptide microarray</h2>
A peptide microarray is a planar slide with peptides spotted onto it or assembled directly on the surface by in-situ synthesis. Whereas peptides spotted can undergo quality controls that include mass spectrometer analysis and concentration normalization before spotting and result from a single synthetic batch, peptides synthesized directly on the surface may suffer from batch-to-batch variation and limited quality control options. However, peptide synthesis on chip allows the parallel synthesis of tens of thousands of peptides providing larger peptide libraries paired with lower synthesis costs.<a class="footnote-ref" id="fnref:8" href="#fn:8">8</a> Peptides are ideally covalently linked through a chemoselective bond leading to peptides with the same orientation for interaction profiling. Some alternative procedures describe unspecific covalent binding and adhesive immobilization.
However, <a href="/facts/Lithography/LFwpJbE7">lithographic methods</a> can be used to overcome the problem of excessive number of coupling cycles. Combinatorial synthesis of peptide arrays onto a microchip by laser printing has been described,<a class="footnote-ref" id="fnref:9" href="#fn:9">9</a><a class="footnote-ref" id="fnref:10" href="#fn:10">10</a> where a modified colour <a href="/facts/Laser_Printer/fJ2GrUBj">laser printer</a> is used in combination with conventional <a href="/facts/Solid_phase_peptide_synthesis/Upd4aqKa">solid-phase peptide synthesis</a> chemistry.<a class="footnote-ref" id="fnref:11" href="#fn:11">11</a> Amino acids are immobilized within toner particles, and the peptides are printed onto the chip surface in consecutive, combinatorial layers. Melting of the toner upon the start of the coupling reaction ensures that delivery of the amino acids and the coupling reaction can be performed independently. Another advantage of this method is that each amino acid can be produced and purified separately, followed by embedding it into the toner particles, which allows long-term storage.

<h2 id="applications-of-peptide-microarrays">Applications of peptide microarrays</h2>
Peptide microarrays can be used to study different kinds of protein-protein interactions, specially those involving modular protein substructures called peptide recognition modules or, most commonly, protein interaction domains. The reason for this is that such protein substructures recognize short linear motifs often exposed in natively unstructured regions of the binding partner, such that the interaction can be modelled in vitro by peptides as probes and the peptide recognition module as analyte. Most publications can be found in the context of immune monitoring and enzyme profiling.

<h3>Immunology</h3>
<ul><li>Mapping of immunodominant regions in antigens or whole proteomes<a class="footnote-ref" id="fnref:12" href="#fn:12">12</a><a class="footnote-ref" id="fnref:13" href="#fn:13">13</a><a class="footnote-ref" id="fnref:14" href="#fn:14">14</a><a class="footnote-ref" id="fnref:15" href="#fn:15">15</a></li>
<li>Seromarker discovery<a class="footnote-ref" id="fnref:16" href="#fn:16">16</a><a class="footnote-ref" id="fnref:17" href="#fn:17">17</a></li>
<li>Monitoring of clinical trials<a class="footnote-ref" id="fnref:18" href="#fn:18">18</a></li>
<li>Profiling of antibody signatures<a class="footnote-ref" id="fnref:19" href="#fn:19">19</a><a class="footnote-ref" id="fnref:20" href="#fn:20">20</a> and <a href="/facts/Epitope_mapping/EPNTaz9V">epitope mapping</a></li>
<li>Finding neutralizing antibodies<a class="footnote-ref" id="fnref:21" href="#fn:21">21</a></li></ul>

<h3>Enzyme profiling</h3>
<ul><li>Identification of substrates for orphan enzymes<a class="footnote-ref" id="fnref:22" href="#fn:22">22</a></li>
<li>Optimization of known enzyme substrates<a class="footnote-ref" id="fnref:23" href="#fn:23">23</a></li>
<li>Elucidation of signal transduction pathways<a class="footnote-ref" id="fnref:24" href="#fn:24">24</a></li>
<li>Detection of contaminating enzyme activities</li>
<li>Consensus sequence and key residues determination<a class="footnote-ref" id="fnref:25" href="#fn:25">25</a></li>
<li>Identifying sites for protein-protein interactions within a complex<a class="footnote-ref" id="fnref:26" href="#fn:26">26</a></li></ul>
<h2 id="analysis-and-evaluation-of-results">Analysis and evaluation of results</h2>
Data analysis and evaluation of results is the most important part of every microarray experiment.<a class="footnote-ref" id="fnref:27" href="#fn:27">27</a> After scanning the microarray slides, the scanner records a 20-bit, 16-bit or 8-bit numeric image in tagged image file format (*.tif). The .tif-image enables interpretation and quantification of each fluorescent spot on the scanned microarray slide. This quantitative data is the basis for performing statistical analysis on measured binding events or peptide modifications on the microarray slide. For evaluation and interpretation of detected signals an allocation of the peptide spot (visible in the image) and the corresponding peptide sequence has to be performed. The data for allocation is usually saved in the GenePix Array List (.gal) file and supplied together with the peptide microarray. The .gal-file (a tab-separated text file) can be opened using microarray quantification software-modules or processed with a text editor (e.g. notepad) or Microsoft Excel. This "gal" file is most often provided by the microarray manufacturer and is generated by input txt files and tracking software built into the robots that do the microarray manufacturing.

<h2 id="references">References</h2>

<ol>
<li id="fn:1">Panse, S; Dong, L; Burian, A; Carus, R; Schutkowski, M; Reimer, U; Schneider-Mergener, J (2004). "Profiling of generic anti-phosphopeptide antibodies and kinases with peptide microarrays using radioactive and fluorescence-based assays". Molecular Diversity. 8 (3): 291–9. doi:10.1023/B:MODI.0000036240.39384.eb. PMID 15384422. S2CID 407457. <a href="/wiki/Doi_(identifier)" target="_blank">/wiki/Doi_(identifier)</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></li>
<li id="fn:2">Kaeberlein, Matt; McDonagh, Thomas; Heltweg, Birgit; Hixon, Jeffrey; Westman, Eric A.; Caldwell, Seth D.; Napper, Andrew; Curtis, Rory; DiStefano, Peter S. (2005-04-29). "Substrate-specific Activation of Sirtuins by Resveratrol". Journal of Biological Chemistry. 280 (17): 17038–17045. doi:10.1074/jbc.M500655200. ISSN 0021-9258. PMID 15684413. <a href="https://doi.org/10.1074%2Fjbc.M500655200" target="_blank">https://doi.org/10.1074%2Fjbc.M500655200</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></li>
<li id="fn:3">Fernández Gavela, Adrián; Grajales García, Daniel; Ramirez, Jhonattan C.; Lechuga, Laura M. (2016-02-24). "Last Advances in Silicon-Based Optical Biosensors". Sensors. 16 (3): 285. Bibcode:2016Senso..16..285F. doi:10.3390/s16030285. PMC 4813860. PMID 26927105. <a href="/wiki/Laura_Lechuga" target="_blank">/wiki/Laura_Lechuga</a> <a href="#fnref:3" class="footnote-back-ref">↩</a></li>
<li id="fn:4">Fang, Ye (2010). "Resonant Waveguide Grating Biosensor for Microarrays". Optical Guided-wave Chemical and Biosensors II. Springer Series on Chemical Sensors and Biosensors. Vol. 8. Springer, Berlin, Heidelberg. pp. 27–42. doi:10.1007/978-3-642-02827-4_2. ISBN 9783642028267. <a href="9783642028267" target="_blank">9783642028267</a> <a href="#fnref:4" class="footnote-back-ref">↩</a></li>
<li id="fn:5">Picaud, Sarah; Filippakopoulos, Panagis (2015-08-17). "SPOTing Acetyl-Lysine Dependent Interactions". Microarrays. 4 (3): 370–388. doi:10.3390/microarrays4030370. PMC 4996381. PMID 27600229. <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4996381" target="_blank">https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4996381</a> <a href="#fnref:5" class="footnote-back-ref">↩</a></li>
<li id="fn:6">Hundsberger, Harald; Önder, Kamil; Schuller-Götzburg, Peter; Virok, Dezso P.; Herzog, Julia; Rid, Raphaela (2017-06-08). "Assembly and use of high-density recombinant peptide chips for large-scale ligand screening is a practical alternative to synthetic peptide libraries". BMC Genomics. 18 (1): 450. doi:10.1186/s12864-017-3814-3. ISSN 1471-2164. PMC 5463365. PMID 28595602. <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5463365" target="_blank">https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5463365</a> <a href="#fnref:6" class="footnote-back-ref">↩</a></li>
<li id="fn:7">Szymczak, Lindsey C.; Kuo, Hsin-Yu; Mrksich, Milan (2018-01-02). "Peptide Arrays: Development and Application". Analytical Chemistry. 90 (1): 266–282. doi:10.1021/acs.analchem.7b04380. ISSN 0003-2700. PMC 6526727. PMID 29135227. <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6526727" target="_blank">https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6526727</a> <a href="#fnref:7" class="footnote-back-ref">↩</a></li>
<li id="fn:8">Beyer, M; Nesterov, A; Block, I; König, K; Felgenhauer, T; Fernandez, S; Leibe, K; Torralba, G; Hausmann, M; Trunk, U; Lindenstruth, V; Bischoff, FR; Stadler, V; Breitling, F (Dec 21, 2007). "Combinatorial synthesis of peptide arrays onto a microchip". Science. 318 (5858): 1888. Bibcode:2007Sci...318.1888B. doi:10.1126/science.1149751. PMID 18096799. S2CID 33941406. <a href="/wiki/Bibcode_(identifier)" target="_blank">/wiki/Bibcode_(identifier)</a> <a href="#fnref:8" class="footnote-back-ref">↩</a></li>
<li id="fn:9">Beyer, M; Nesterov, A; Block, I; König, K; Felgenhauer, T; Fernandez, S; Leibe, K; Torralba, G; Hausmann, M; Trunk, U; Lindenstruth, V; Bischoff, FR; Stadler, V; Breitling, F (Dec 21, 2007). "Combinatorial synthesis of peptide arrays onto a microchip". Science. 318 (5858): 1888. Bibcode:2007Sci...318.1888B. doi:10.1126/science.1149751. PMID 18096799. S2CID 33941406. <a href="/wiki/Bibcode_(identifier)" target="_blank">/wiki/Bibcode_(identifier)</a> <a href="#fnref:9" class="footnote-back-ref">↩</a></li>
<li id="fn:10">Breitling, Frank; Felgenhauer, Thomas; Nesterov, Alexander; Lindenstruth, Volker; Stadler, Volker; Bischoff, F. Ralf (2009-03-23). "Particle-Based Synthesis of Peptide Arrays". ChemBioChem. 10 (5): 803–808. doi:10.1002/cbic.200800735. ISSN 1439-7633. PMID 19191248. S2CID 13173295. <a href="/wiki/Doi_(identifier)" target="_blank">/wiki/Doi_(identifier)</a> <a href="#fnref:10" class="footnote-back-ref">↩</a></li>
<li id="fn:11">Stadler, Volker; Felgenhauer, Thomas; Beyer, Mario; Fernandez, Simon; Leibe, Klaus; Güttler, Stefan; Gröning, Martin; König, Kai; Torralba, Gloria (2008-09-01). "Combinatorial Synthesis of Peptide Arrays with a Laser Printer". Angewandte Chemie International Edition. 47 (37): 7132–7135. doi:10.1002/anie.200801616. ISSN 1521-3773. PMID 18671222. <a href="/wiki/Doi_(identifier)" target="_blank">/wiki/Doi_(identifier)</a> <a href="#fnref:11" class="footnote-back-ref">↩</a></li>
<li id="fn:12">Zandian, Arash; Forsström, Björn; Häggmark-Månberg, Anna; Schwenk, Jochen M.; Uhlén, Mathias; Nilsson, Peter; Ayoglu, Burcu (9 February 2017). "Whole-Proteome Peptide Microarrays for Profiling Autoantibody Repertoires within Multiple Sclerosis and Narcolepsy". Journal of Proteome Research. 16 (3): 1300–1314. doi:10.1021/acs.jproteome.6b00916. PMID 28121444. <a href="https://doi.org/10.1021%2Facs.jproteome.6b00916" target="_blank">https://doi.org/10.1021%2Facs.jproteome.6b00916</a> <a href="#fnref:12" class="footnote-back-ref">↩</a></li>
<li id="fn:13">Lin, Jing; Bardina, Ludmilla; Shreffler, Wayne G.; Andreae, Doerthe A.; Ge, Yongchao; Wang, Julie; Bruni, Francesca M.; Fu, Zhiyan; et al. (2009). "Development of a novel peptide microarray for large-scale epitope mapping of food allergens". Journal of Allergy and Clinical Immunology. 124 (2): 315–22, 322.e1–3. doi:10.1016/j.jaci.2009.05.024. PMC 2757036. PMID 19577281. <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2757036" target="_blank">https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2757036</a> <a href="#fnref:13" class="footnote-back-ref">↩</a></li>
<li id="fn:14">Linnebacher, M; Lorenz, P; Koy, C; Jahnke, A; Born, N; Steinbeck, F; Wollbold, J; Latzkow, T; et al. (2012). "Clonality characterization of natural epitope-specific antibodies against the tumor-related antigen topoisomerase IIa by peptide chip and proteome analysis: A pilot study with colorectal carcinoma patient samples". Analytical and Bioanalytical Chemistry. 403 (1): 227–38. doi:10.1007/s00216-012-5781-5. PMID 22349330. S2CID 33847079. <a href="/wiki/Doi_(identifier)" target="_blank">/wiki/Doi_(identifier)</a> <a href="#fnref:14" class="footnote-back-ref">↩</a></li>
<li id="fn:15">Jaenisch, Thomas; Heiss, Kirsten; Fischer, Nico; Geiger, Carolin; Bischoff, F. Ralf; Moldenhauer, Gerhard; Rychlewski, Leszek; Sié, Ali; Coulibaly, Boubacar (April 2019). "High-density Peptide Arrays Help to Identify Linear Immunogenic B-cell Epitopes in Individuals Naturally Exposed to Malaria Infection". Molecular & Cellular Proteomics. 18 (4): 642–656. doi:10.1074/mcp.RA118.000992. ISSN 1535-9484. PMC 6442360. PMID 30630936. <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6442360" target="_blank">https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6442360</a> <a href="#fnref:15" class="footnote-back-ref">↩</a></li>
<li id="fn:16">Callaway, Ewen (2011). "Clues emerge to explain first successful HIV vaccine trial". Nature. doi:10.1038/news.2011.541. <a href="/wiki/Doi_(identifier)" target="_blank">/wiki/Doi_(identifier)</a> <a href="#fnref:16" class="footnote-back-ref">↩</a></li>
<li id="fn:17">Heiss, Kirsten; Heidepriem, Jasmin; Fischer, Nico; Weber, Laura K.; Dahlke, Christine; Jaenisch, Thomas; Loeffler, Felix F. (September 2020). "Rapid Response to Pandemic Threats: Immunogenic Epitope Detection of Pandemic Pathogens for Diagnostics and Vaccine Development Using Peptide Microarrays". Journal of Proteome Research. 19 (11): 4339–4354. doi:10.1021/acs.jproteome.0c00484. hdl:21.11116/0000-0007-05EF-7. PMID 32892628.{{cite journal}}: CS1 maint: date and year (link) <a href="/wiki/Doi_(identifier)" target="_blank">/wiki/Doi_(identifier)</a> <a href="#fnref:17" class="footnote-back-ref">↩</a></li>
<li id="fn:18">Garren, H; Robinson, WH; Krasulová, E; Havrdová, E; Nadj, C; Selmaj, K; Losy, J; Nadj, I; et al. (2008). "Phase 2 trial of a DNA vaccine encoding myelin basic protein for multiple sclerosis". Annals of Neurology. 63 (5): 611–20. CiteSeerX 10.1.1.418.3083. doi:10.1002/ana.21370. PMID 18481290. S2CID 16111674. {{cite journal}}: |first16= has generic name (help)CS1 maint: numeric names: authors list (link) <a href="/wiki/CiteSeerX_(identifier)" target="_blank">/wiki/CiteSeerX_(identifier)</a> <a href="#fnref:18" class="footnote-back-ref">↩</a></li>
<li id="fn:19">Gaseitsiwe, S.; Valentini, D.; Mahdavifar, S.; Reilly, M.; Ehrnst, A.; Maeurer, M. (2009). "Peptide Microarray-Based Identification of Mycobacterium tuberculosis Epitope Binding to HLA-DRB1*0101, DRB1*1501, and DRB1*0401". Clinical and Vaccine Immunology. 17 (1): 168–75. doi:10.1128/CVI.00208-09. PMC 2812096. PMID 19864486. <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2812096" target="_blank">https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2812096</a> <a href="#fnref:19" class="footnote-back-ref">↩</a></li>
<li id="fn:20">Weber, Laura K.; Palermo, Andrea; Kügler, Jonas; Armant, Olivier; Isse, Awale; Rentschler, Simone; Jaenisch, Thomas; Hubbuch, Jürgen; Dübel, Stefan (April 2017). "Single amino acid fingerprinting of the human antibody repertoire with high density peptide arrays". Journal of Immunological Methods. 443: 45–54. doi:10.1016/j.jim.2017.01.012. ISSN 1872-7905. PMID 28167275. <a href="/wiki/Doi_(identifier)" target="_blank">/wiki/Doi_(identifier)</a> <a href="#fnref:20" class="footnote-back-ref">↩</a></li>
<li id="fn:21">Tomaras, GD; Binley, JM; Gray, ES; Crooks, ET; Osawa, K; Moore, PL; Tumba, N; Tong, T; et al. (2011). "Polyclonal B cell responses to conserved neutralization epitopes in a subset of HIV-1-infected individuals". Journal of Virology. 85 (21): 11502–19. doi:10.1128/JVI.05363-11. PMC 3194956. PMID 21849452. <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3194956" target="_blank">https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3194956</a> <a href="#fnref:21" class="footnote-back-ref">↩</a></li>
<li id="fn:22">Kindrachuk, J; Arsenault, R; Kusalik, T; Kindrachuk, KN; Trost, B; Napper, S; Jahrling, PB; Blaney, JE (2011). "Systems kinomics demonstrates congo basin monkeypox virus infection selectively modulates host cell signaling responses as compared to West African monkeypox virus". Molecular & Cellular Proteomics. 11 (6): M111.015701. doi:10.1074/mcp.M111.015701. PMC 3433897. PMID 22205724. <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3433897" target="_blank">https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3433897</a> <a href="#fnref:22" class="footnote-back-ref">↩</a></li>
<li id="fn:23">Lizcano, J. M.; Deak, M; Morrice, N; Kieloch, A; Hastie, CJ; Dong, L; Schutkowski, M; Reimer, U; Alessi, DR (2002). "Molecular Basis for the Substrate Specificity of NIMA-related Kinase-6 (NEK6). EVIDENCE THAT NEK6 DOES NOT PHOSPHORYLATE THE HYDROPHOBIC MOTIF OF RIBOSOMAL S6 PROTEIN KINASE AND SERUM- AND GLUCOCORTICOID-INDUCED PROTEIN KINASE IN VIVO". Journal of Biological Chemistry. 277 (31): 27839–49. doi:10.1074/jbc.M202042200. PMID 12023960. <a href="https://doi.org/10.1074%2Fjbc.M202042200" target="_blank">https://doi.org/10.1074%2Fjbc.M202042200</a> <a href="#fnref:23" class="footnote-back-ref">↩</a></li>
<li id="fn:24">Delgado, J. Y.; Coba, M.; Anderson, C. N. G.; Thompson, K. R.; Gray, E. E.; Heusner, C. L.; Martin, K. C.; Grant, S. G. N.; O'Dell, T. J. (2007). "NMDA Receptor Activation Dephosphorylates AMPA Receptor Glutamate Receptor 1 Subunits at Threonine 840". Journal of Neuroscience. 27 (48): 13210–21. doi:10.1523/JNEUROSCI.3056-07.2007. PMC 2851143. PMID 18045915. <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2851143" target="_blank">https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2851143</a> <a href="#fnref:24" class="footnote-back-ref">↩</a></li>
<li id="fn:25">Thiele, A; Krentzlin, K; Erdmann, F; Rauh, D; Hause, G; Zerweck, J; Kilka, S; Pösel, S; et al. (2011). "Parvulin 17 promotes microtubule assembly by its peptidyl-prolyl cis/trans isomerase activity". Journal of Molecular Biology. 411 (4): 896–909. doi:10.1016/j.jmb.2011.06.040. PMID 21756916. <a href="/wiki/Doi_(identifier)" target="_blank">/wiki/Doi_(identifier)</a> <a href="#fnref:25" class="footnote-back-ref">↩</a></li>
<li id="fn:26">Parsons, LS; Wilkens, S (2012). "Probing subunit-subunit interactions in the yeast vacuolar ATPase by peptide arrays". PLOS ONE. 7 (10): e46960. Bibcode:2012PLoSO...746960P. doi:10.1371/journal.pone.0046960. PMC 3470569. PMID 23071676. <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3470569" target="_blank">https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3470569</a> <a href="#fnref:26" class="footnote-back-ref">↩</a></li>
<li id="fn:27">Hecker, M; Lorenz, P; Steinbeck, F; Hong, L; Riemekasten, G; Li, Y; Zettl, UK; Thiesen, HJ (2012). "Computational analysis of high-density peptide microarray data with application from systemic sclerosis to multiple sclerosis". Autoimmunity Reviews. 11 (3): 180–90. doi:10.1016/j.autrev.2011.05.010. PMID 21621003. <a href="/wiki/Doi_(identifier)" target="_blank">/wiki/Doi_(identifier)</a> <a href="#fnref:27" class="footnote-back-ref">↩</a></li>
</ol>

Peptide microarray open-in-new

Peptide microarray