#Caulobacter crescentus CB15 100247 CC3443 ykkC #Caulobacter segnis ATCC 21756 10275038 Cseg_0241 ykkC #Caulobacter sp. K31 7045230 Caul_4732 ykkC #Phenylobacterium zucineum HLK1 5633452 PHZ_c0240 ykkC