>4r9u_A mol:protein length:333 Vitamin B12 import system permease protein BtuC GPSGTSHMLTLARQQQRQNIRWLLSLSVLMLLALLLSLSAGEQWISPGDWFTPRGELFV WQIRLPRTLAVLLVGAALAISGAVMQALFENPLAEPGLLGVSNGAGVGLIAAVLLGQGQ LPNWALGLSAIAGALIITLILLRFARRHLSTSRLLLAGVALGIISSALMTWAIYFSTSV DLRQLMYWMMGGFGGVDWRQSWLMLALIPVLLWISSQSRPMNMLALGEISARQLGLPLW FWRNVLVAATGWMVGVSVALAGAIGFIGLVIPHILRLSGLTDHRVLLPGCALAGASALL LADIVARLALAAAELPIGVVTATLGAPVFIWLLLKAGR