該基因編碼的蛋白是蛋白酪氨酸磷酸酶（PTP）家族的一員眾所周知，PTPs是調節細胞生長、分化、有絲分裂周期和癌基因轉化等多種細胞過程的信號分子該ptp具有胞外區、單個跨膜區和兩個串聯的胞內催化區，因此代表一種受體型ptp。細胞外區域包含一個meprin-a5抗原ptp（mam）結構域、ig樣和纖維粘連蛋白iii樣重復序列。這種ptp被認為在細胞識別和粘附中起作用。對小鼠類似基因的研究表明，ptp在早期神經發育中的作用。據報道，該基因在Jurkat T淋巴瘤細胞中的表達受肉豆蔻酸佛波酯（PMA）或鈣離子載體的調控另一種剪接的轉錄變體已被報道。
The protein encoded by this gene is a member of the protein tyrosine phosphatase (PTP) family. PTPs are known to be signaling molecules that regulate a variety of cellular processes including cell growth, differentiation, mitotic cycle, and oncogenic transformation. This PTP possesses an extracellular region, a single transmembrane region, and two tandem intracellular catalytic domains, and thus represents a receptor-type PTP. The extracellular region contains a meprin-A5 antigen-PTP (MAM) domain, Ig-like and fibronectin type III-like repeats. This PTP was thought to play roles in cell-cell recognition and adhesion. Studies of the similar gene in mice suggested the role of this PTP in early neural development. The expression of this gene was reported to be regulated by phorbol myristate acetate (PMA) or calcium ionophore in Jurkat T lymphoma cells. Alternatively spliced transcript variants have been reported.