title: Modular design of components of the operational RNA code for alanine in evolution.
mesh_terms: D000409:Alanine / Q000235:genetics*; D000412:Alanine-tRNA Ligase / Q000737:chemistry / Q000235:genetics; D001419:Bacteria / Q000235:genetics; D001483:Base Sequence; D003062:Codon; D017124:Conserved Sequence; D019143:Evolution, Molecular; D006801:Humans; D008969:Molecular Sequence Data; D011506:Proteins / Q000235:genetics; D012313:RNA / Q000235:genetics*; D012344:RNA, Transfer, Ala
chemical_list: D003062:Codon; D011506:Proteins; D012344:RNA, Transfer, Ala; D012313:RNA; D000412:Alanine-tRNA Ligase; D000409:Alanine