Abstract
Complementary(c)DNA for rat mammary gland .alpha.-lactalbumin was cloned in a bacterial plasmid, and its sequence was analyzed. The DNA sequence analysis shows that rat .alpha.-lactalbumin has 17 extra residues beyond the COOH terminus of the .alpha.-lactalbumin isolated and sequenced to date from other species. The predicted COOH-terminal sequence is hydrophobic and proline rich and bears some resemblance to .beta.-casein sequences.