CS-L7 50S ribosomal protein L21, chloroplastic CL21 This protein binds to 23S ribosomal RNA in the presence of protein L20 (By similarity). RPL21 RK21_SPIOL MASATLAFSCSSLCATLKLPQNLNPLLLNVPPLSKPFSGVVSPPSLSRLSLLPVAAKRRRFQEIPEELKAEFEEFQRPPNQKPQLSDVLPDDFQAPEPGTPEYNDIINQFLPKKGPPPPREEIFAVVVIGSRQYIVIPGRWIYTQRLKGATVNDKIVLNKVLLVGTKASTYIGTPIVTNAAVHAVVEEQLLDDKVIVFKYKKKKNYRRNIGHRQPITRIKITGITGYEDYPASTLEAEVEAKEEAEAEAEAEAVPV 256