The Purple bacteria, also called Proteobacteria is the largest and most physiological diverse of all bacteria Beta purple bacteria Chemolithotrophs lemoore Chemoorganotrophs Gamma purple Alpha purple bacteria bacteria Chemolithotrophs Chemoorganotrophs lithotrophs Epsilon purple bacteria (all chemoorganotrophs) Delta purple bacteria Phototroph (all chemoorganotrophs) Loss of photosynthetic ability Ancestral phototrophThe Purple Bacteria, also called Proteobacteria is the largest and most physiological diverse of all bacteria