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- noun organic chemistry, biochemistry A
polypeptide(or section of a protein) containing only alanineresidues
from Wiktionary, Creative Commons Attribution/Share-Alike License
Here, a residue or group of target residues are identified (e.g., charged residues such as arg, asp, his, lys, and glu) and replaced by a neutral or negatively charged amino acid (most preferably alanine or polyalanine) to affect the interaction of the amino acids with IL-10 antigen.