High affinity IgE receptor alpha chain (FceRIa)

摘要

Human high affinity IgE receptor alpha chain (FceRIa), wherein the amino acid lysine (K43) at position 43 is alanine, serine, tyrosine, isoleucine, leucine, asparagine, aspartic acid, methionine, phenylalanine, glutamic acid, Provided is FcerIA, which is substituted with an amino acid selected from the group consisting of threonine, glutamine, tryptophan, glycine and valine, preferably alanine, glycine, serine or tyrosine, especially alanine.