title: Amino acid sequence of immunity protein (B subunit) of colicin E3.
abstract: The amino acid sequence of immunity protein (protein B) of colicin E3 (84 amino acid residues) was determined. B was first split into two fragments, CB 1 and CB 2, by CNBr treatment. The structure of CB 1 (the N-terminal part of B) was determined by Edman degradation of whole protein B. The structure of CB 2 (the C-terminal part of B) was established by sequencing its four trypsin peptides. The sequences and the alignment of the tryptic peptides were completed by analyses of thermolysin peptides of CB 2. These results established the complete amino acid sequence of B.
mesh_terms: D000595:Amino Acid Sequence; D001426:Bacterial Proteins; D003087:Colicins / Q000032:analysis*; D003488:Cyanogen Bromide; D010446:Peptide Fragments; D010447:Peptide Hydrolases; D013211:Staphylococcus aureus / Q000201:enzymology; D013820:Thermolysin; D014357:Trypsin
chemical_list: D001426:Bacterial Proteins; D003087:Colicins; D010446:Peptide Fragments; C007104:colicin immunity proteins; D010447:Peptide Hydrolases; D014357:Trypsin; D013820:Thermolysin; D003488:Cyanogen Bromide