321 Required during biogenesis of c-type cytochromes (cytochrome c6 and cytochrome f) at the step of heme attachment (By similarity). ccsA CCSA_ORYSA MLFATLEHILTHISFSTISIVITIHLITLLVRELGGLRDSSEKGMIATFFCITGFLVSRWASSGHFPLSNLYESLIFLSWALYILHMIPKIQNSKNDLSTITTPSTILTQGFATSGLLTEMHQSTILVPALQSQWLMMHVSMMLLSYATLLCGSLLSAALLMIRFRKNLDFFSKKKKNVLSKTFFFNEIEYFYAKRSALKSTFFPLFPNYYKYQLIERLDSWSYRVISLGFTLLTIGILCGAVWANEAWGSYWNWDPKETWAFITWTIFAIYLHSRTNPNWKGTKSAFVASIGFLIIWICYFGINLLGIGLHSYGSFTLPI Cytochrome c biogenesis protein ccsA PA168