to study the expression of the iddm associated hla-dq beta-chain alleles , we immunized rabbits with 12 to 13 amino acid long peptides representing hla-dqw7 and -dqw8 allelic sequences , differing only by one amino acid in position 57 being aspartic acid ( asp ) and alanine ( ala ) , respectively .
C0002520
amino
C0001898
alanine