PLAP is the abbreviation for Placental alkaline phosphatase, which is an enzyme protein. PLAP is highly expressed in placental tissue, hence its name. The human placental ALP (PLAP) gene was identified on chromosome 2 and possesses 87% similarity with IAP gene. Interestingly, cancer cells can re-express PLAP gene as Regan isoenzyme. In contrast to the other ALP isoenzymes, PLAP is a polymorphic enzyme with up to 18 allelozymes originating from point mutations. As a result of the low catalytic activity in comparison with the other isoenzymes, PLAP is considered to be inefficient due to the neutral pH of placenta. Furthermore, the structure of PLAP consists of two disulfide bridges: the first one stabilises the PLAP orientation, which is situated near the anchor of the Asp481 Glycosylyphosphatidylinositol (GPI) and the second stiffens the anchor of the carbohydrate chain and is situated close the first part of the glycosylation. There are several roles by PLAP, including the transmission of mother-to-fetus immunoglobulins G (IgG). PLAP stimulates DNA synthesis and fibroblast cell proliferation with insulin in the presence of Zn2+ and Ca2+. It is a synthesiser for a single tissue called syncytiotrophoblast and responsible for transfer of substances such as nutrients and oxygen. PLAP is an essential modulator of foetal growth. PLAP is also a potential marker for various cancers.

高純度、高活性、低內毒素、高批間一致性

SDS-PAGE

Figure 1.On SDS-PAGE under reducing (R) condition. The gel was stained overnight with Coomassie Blue. The purity of the protein is greater than 95%.

Bioactivity-ELISA

Figure 2.Human ALPP Protein; His Tag was immobilized at 1 μg/ml (100 μL/well). Increasing concentrations of Anti-ALPPL2 mIgG2a antibody were added.

-85 ~ -65℃保存，收到貨之日起，6個月有效期。避免反復凍融，建議等分分裝為一次實驗使用量，分裝后，-80℃凍存。