ALPP, also known as alkaline phosphatase, placental, is a family of dimeric metalloenzymes catalyzing the hydrolysis of monoesters of phosphoric acid. Also, this protein catalyzes a transphosphorylation reaction in the presence of large concentrations of phosphate acceptors. It occurs widely in nature, and are found in many organisms from Escherichia coli to man. Most alkaline phosphatases are homodimeric enzymes and each catalytic site contains three metal ions (two Zn and one Mg), that are necessary for enzymatic activity. Source: Recombinant protein corresponding to aa23-506 from human ALPP, fused to His-tag at C-terminal expressed in insect cell. Molecular Weight: ~53.9kD (494aa) Specific Activity: >2500 units/mg, and is defined as the amount of enzyme that hydrolyze 1nmole of p-nitrophenyl phosphate (pNPP)/minute at pH 7.5 at 37C. Amino Acid Sequence: ADLMIIPVEE ENPDFWNREA AEALGAAKKL QPAQTAAKNL IIFLGDGMGV STVTAARILK GQKKDKLGPE LPLAMDRFPY VALSKTYNVD KHVPDSGATA TAYLCGVKGN FQTIGLSAAA RFNQCNTTRG NEVISVMNRA KKAGKSVGVV TTTRVQHASP AGTYAHTVNR NWYSDADVPA SARQEGCQDI ATQLISNMDI DVILGGGRKY MFRMGTPDPE YPDDYSQGGT RLDGKNLVQE WLAKRQGARY VWNRTELMQA SLDPSVTHLM GLFEPGDMKY EIHRDSTLDP SLMEMTEAAL RLLSRNPRGF FLFVEGGRID HGHHESRAYR ALTETIMFDD AIERAGQLTS EEDTLSLVTA DHSHVFSFGG YPLRGSSIFG LAPGKARDRK AYTVLLYGNG PGYVLKDGAR PDVTESESGS PEYRQQSAVP LDEETHAGED VAVFARGPQA HLVHGVQEQT FIAHVMAFAA CLEPYTACDL APPAGTTDHH HHHH Storage and Stability: May be stored at 4C for short-term only. Aliquot to avoid repeated freezing and thawing. Store at -20C. Aliquots are stable for 6 months after receipt at -20C. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap. Further dilutions can be made in assay buffer.
