( ii ) although some of the cells were encased by dense metal deposits , there was little apparent correlation between metal deposition and the occurrence of microbial mats , ( iii ) highly differentiated forms appeared to be analogues of certain cyanobacteria , ( iv ) isolates from massive mats of a prosthecate bacterium could be identified as hyphomicrobium spp. , ( v ) intracellular membrane systems similar to those found in methylotrophic and nitrifying bacteria were observed in approximately 20 % of the cells composing the mats , ( vi ) thiosulfate enrichments made from mat material resulted in isolations of different types of sulfur-oxidizing bacteria including the obligately chemolithotrophic genus thiomicrospira .
C0021868
intracellular membrane
C0007634
cells