該基因屬于血管抑制素結合蛋白的motin家族，具有保守的螺旋結構域和C末端PDZ結合基序編碼蛋白主要在毛細血管內皮細胞和胎盤大血管中表達，可能介導血管抑制素對血管形成的抑制作用，以及在新生血管形成過程中內皮細胞向生長因子的遷移。選擇性剪接導致編碼不同亞型的多個轉錄變體[由RefSeq提供，2008年7月]
This gene belongs to the motin family of angiostatin binding proteins characterized by conserved coiled-coil domains and C-terminal PDZ binding motifs. The encoded protein is expressed predominantly in endothelial cells of capillaries as well as larger vessels of the placenta where it may mediate the inhibitory effect of angiostatin on tube formation and the migration of endothelial cells toward growth factors during the formation of new blood vessels. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Jul 2008]