Functions as a specific chaperone for yopN. It could facilitate the secretion and the subsequent translocation of yopN. Chaperone protein yscB YSCB_YEREN MQNLLKNLATSLGRKPFVADKQGVYRLTIDKHLVMLTPHGSELVLRTPIDAPMLREGNNVNVTLLRSLMQQALAWAKRYPQTLVLDDCGQLVLEARLRLQELDTHGLQEVINKQLALLEHLIPQLTPFSVASRVGWN Yop proteins translocation protein B 137 yscB