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Pseudomonadota
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<p>Pseudomonadota (synonym "Proteobacteria") is a major <a href="/facts/Phylum/ELT3Jyax">phylum</a> of <a href="/facts/Gram-negative_bacteria/S1PbVtp4">gram-negative bacteria</a>. They include <a href="/facts/Pathogen/axMXtV1M">pathogenic</a> and free-living (non-<a href="/facts/Parasitism/HWPcgky7">parasitic</a>) genera. The phylum comprises six classes <i><a href="/facts/Acidithiobacillia/cTmegKyg">Acidithiobacillia</a>, <a href="/facts/Alphaproteobacteria/92fz61Lz">Alphaproteobacteria</a>, <a href="/facts/Betaproteobacteria/k6lha8ll">Betaproteobacteria</a>, <a href="/facts/Gammaproteobacteria/2ISNVT8r">Gammaproteobacteria</a>, <a href="/facts/Hydrogenophilaceae/UQJKMHLK">Hydrogenophilia</a></i>, and <i><a href="/facts/Zetaproteobacteria/aWGJ00K2">Zetaproteobacteria</a>.</i> The Pseudomonadota are widely diverse, with differences in <a href="/facts/Morphology_(biology)/Nl3B0myy">morphology</a>, <a href="/facts/Metabolism/WxDrm8k5">metabolic</a> processes, relevance to humans, and <a href="/facts/Ecology/YE8upuJU">ecological</a> influence. </p>