[Term] id: PR:000023827 name: 50S ribosomal protein L21 def: "A protein that is a translation product of the Escherichia coli K-12 rplU gene or a 1:1 ortholog thereof." [PRO:DNx] comment: Category=gene. synonym: "rplU" EXACT PRO-short-label [PRO:DNx] is_a: PR:000000001 ! protein