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.

高纯度、高活性、低内毒素、高批间一致性

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

-85 ~ -65℃保存，收到货之日起，6个月有效期。避免反复冻融，建议等分分装为一次实验使用量，分装后，-80℃冻存。