caution:Ref.3 sequence incorrectly indicated as originating from mouse.,miscellaneous:The gene encoding for this protein is located in the pseudoautosomal region 1 (PAR1) of X and Y chromosomes.,online information:Blood group antigen gene mutation database,polymorphism:XG is responsible for the Xg blood group system.,PTM:O-glycosylated.,similarity:Belongs to the CD99 family.,
Cell membrane ; Single-pass type I membrane protein .
Expressed in erythroid tissues, including thymus, bone marrow and fetal liver, and in several nonerythroid tissues, such as heart, placenta, skeletal muscle, thyroid and trachea, as well as in skin fibroblasts. Expression is low or undetectable in other tissues.