Structural differences between albumin A and albumin C of the house mouse,Mus musculus

✍ Scribed by M. L. Petras; I. A. MacLaren

• Publisher: Springer
• Year: 1976
• Tongue: English
• Weight: 347 KB
• Volume: 14
• Category: Article
• ISSN: 0006-2928
• DOI: 10.1007/bf00484874

✦ Synopsis

Two albumins, albumin A from C3H mice and albumin C isolated from descendents of the wild mice in which the variant was first uncovered, were found to differ in their electrophoretic properties. Albumin C was shown to bind two more H+ ions than albumin A at pH 5.4. Peptide mapping after trypsin digestion revealed that albumin C had three peptides (TP-C1, TP-C2, and TP-C3) which were missing in albumin A. The latter likewise had a peptide (TP-A1) which was not found in albumin C. An amino acid analysis of the variant peptides suggests that TP-A1 had been split into TP-C1 and TP-C2 on digestion with trypsin, because a glutamic acid in TP-A1 was replaced by a lysine. This change would also appropriately alter the electrophoretic properties of albumin C. No obvious counterpart was discovered for TP-C3 of albumin C in albumin A.