title: Ribosomal protein S21 is required for full activity in the initiation of protein synthesis.
mesh_terms: D001426:Bacterial Proteins / Q000096:biosynthesis* / Q000378:metabolism; D002021:Buffers; D002499:Centrifugation, Density Gradient; D004591:Electrophoresis, Polyacrylamide Gel; D004926:Escherichia coli / Q000378:metabolism*; D010452:Peptide Biosynthesis; D012329:RNA, Bacterial; D012335:RNA, Ribosomal; D012343:RNA, Transfer; D012270:Ribosomes / Q000378:metabolism*; D013395:Sucrose
chemical_list: D001426:Bacterial Proteins; D002021:Buffers; D012329:RNA, Bacterial; D012335:RNA, Ribosomal; D013395:Sucrose; D012343:RNA, Transfer