| monophyletic origin of beta-division proteobacterial endosymbionts and their coevolution with insect trypanosomatid protozoa blastocrithidia culicis and crithidia spp. | some trypanosomatid protozoa (order kinetoplastida) are well known to harbor bacterial endosymbionts. their phylogenetic positions and evolutionary relationships with the hosts were deduced by comparing the rrna gene sequences. earlier, we observed that these symbionts from three crithidia spp. are identical and are closely related to bordetella bronchiseptica. we have now sequenced the genes of another endosymbiont and the host protozoan blastocrithidia culicis. the 16s rrna genes of the blasto ... | 1994 | 7521530 |