Source:http://linkedlifedata.com/resource/umls/id/C1167012
GO: The smaller of the two subunits of a ribosome. [GOC:mah],MSH: The small ribonucleoprotein component of RIBOSOMES. It contains the MESSENGER RNA binding site and two TRANSFER RNA binding sites - one for the incoming AMINO ACYL TRNA (A site) and the other (P site) for the peptidyl tRNA carrying the elongating peptide chain.