title: Separation and chemical differentiation of alpha and beta subunits in yeast phosphofructokinase.
abstract: The two types of subunits alpha and beta constitutive of yeast phosphofructokinase have been separated by ion-exchange chromatography under denaturating conditions. Amino acid analysis and peptide mapping were performed on the isolated subunits. The frequence of most of the amino acids significantly differs between the two types of polypeptide chains. Moreover, tryptic peptide maps of alpha and beta subunits are clearly not superimposable. These chemical differences seem sufficient to account for the distinct catalytic and regulatory functions of beta and alpha subunits in the yeast phosphofructokinase reaction.
mesh_terms: D000596:Amino Acids / Q000032:analysis; D002855:Chromatography, Thin Layer; D046911:Macromolecular Substances; D008970:Molecular Weight; D010446:Peptide Fragments / Q000032:analysis; D010455:Peptides / Q000302:isolation & purification; D010732:Phosphofructokinase-1 / Q000302:isolation & purification*; D012441:Saccharomyces cerevisiae / Q000201:enzymology*; D014357:Trypsin
chemical_list: D000596:Amino Acids; D046911:Macromolecular Substances; D010446:Peptide Fragments; D010455:Peptides; D010732:Phosphofructokinase-1; D014357:Trypsin