>4v6u_BR mol:protein length:97 50S ribosomal protein L21eMVQKAHSFRRKTRKKLSKHPRRRGLPPLTRFLQEFEVGQRVHIVIEPSYHKGMPDPRFHGRTGTVVGKRGEAYIVEIKDGSKVKTLFIHPVHLRPQK