Expressed in harderian gland (at protein level) (PubMed:21518038). Expressed in hair (at protein level) (PubMed:21518038, PubMed:12823123). Expressed in submaxillary gland and harderian gland (PubMed:21518038). Not N-linked glycosylated. Causes an allergic reaction in human. Binds to IgE (PubMed:21518038, PubMed:12823123). Binds to IgE in 65% of the 26 patients tested allergic to guinea pigs (PubMed:21518038). Is a cause of guinea pig hair allergy (PubMed:12823123). Causes degranulation of humanized rat basophil leukemia cells (RBL) and release of beta-hexosaminidase (PubMed:21518038). Belongs to the calycin superfamily. Lipocalin family.