Provided is a polypeptide comprising a macadamia protein running in a 2D SDS PAGE at pH 6.3 to 8.7 and 53 to 67 kDa or a protein running in a 2D SDS PAGE at pH 6.5 to 7.9 and 20 to 25 kDa or an antigenic variant thereof, and a tag for detection and/or purification, a polypeptide fused with the macadamia protein, or the macadamia protein is modified by glycosylation, phosphorylation, acetylation, decarboxylation, citrullination, or hydroxylation.
