peprotech人肝細(xì)胞生長因子Recombinant Human HGF
PeproTech細(xì)胞因子中不含載體蛋白（Carrier Protein）或其他添加劑（如BSA、HAS或蔗糖等），并且通常以zui少量的鹽來進行凍干處理，因此微量的細(xì)胞因子在凍干過程中會沉積于管內(nèi)，形成很薄或不可見的蛋白層。所以我們建議在收到產(chǎn)品后，務(wù)必在開蓋前先離心，使粘在管蓋或管壁上的蛋白聚集于管底（此時能否見到白色沉淀均屬正?，F(xiàn)象）。
peprotech人肝細(xì)胞生長因子Recombinant Human HGF
產(chǎn)品編號:
100-39
別名:
Hepatocyte Growth Factor, Scatter Factor (SF), Hepatopoietin (HPTA)
描述:
HGF is a potent, mesenchymally-derived mitogen for mature parenchymal hepatocytes, and acts as a growth factor for a broad spectrum of tissues and cell types. HGF signals through a transmembrane tyrosine kinase receptor known as MET. Activities of HGF include the induction of cell proliferation, motility, morphogenesis, inhibition of cell growth, and enhancement of neuron survival. HGF is a crucial mitogen for liver regeneration processes, especially after partial hepatectomy and other liver injuries. Human and murine HGF are cross-reactive. Human HGF is expressed as a linear, polypeptide-precursor glycoprotein containing 697 amino acid residues. Proteolytic processing of this precursor generates the biologically active heterodimeric form of HGF, which consists of two polypeptide chains (α-chain and β-chain) held together by a single disulfide bond resulting in formation of a biologically active heterodimer. The α-chain consists of 463 amino acid residues and four kringle domains. The β-chain consists of 234 amino acid residues. Recombinant Human HGF is an 80.0 kDa polypeptide consisting of 697 amino acid residues.
TIPS：細(xì)胞因子溶解方法
1．離心：高速離心 (10, 000 rpm) 20-30 秒，或低速離心 (2, 000 rpm) 5 分鐘。
2．溶解（Reconstitution）：用去離子水或其它緩沖液（根據(jù)說明書要求進行選擇）溶解至說明書要求的濃度 (一般為 0.1-1.0 mg/mL，如10ug的產(chǎn)品，需用10uL-100uL的去離子水或緩沖液溶解)。溶解時不可振蕩，避免因化學(xué)鍵的斷裂造成蛋白失活，可加入適當(dāng)?shù)娜軇┹p搖并靜置一段時間，待細(xì)胞因子*溶解后使用。溶劑的選擇：
1）要求用去離子水溶解的產(chǎn)品，務(wù)必不可用鹽溶液，避免過高的鹽濃度造成蛋白不可逆的析出；
2) 要求用鹽溶液溶解的產(chǎn)品，請依照說明書上的濃度，同樣也是為了避免過高的鹽濃度。
3．分裝和貯存（Aliquot and Storage）：蛋白溶解后可根據(jù)自己的實驗需要進一步稀釋成工作液，稀釋可用RPMI 1640、DMEM或PBS等溶液，其中含有5-10%的FCS （小牛或胎牛血清）或0.5 %的BSA（牛血清白蛋白）來穩(wěn)定蛋白。工作液在4℃可保存1周，如需長期保存，則需分裝凍存于-20℃ （注意：不可凍存于-80℃）。分裝時每管中工作液的體積是一次實驗的用量，以實現(xiàn)每次實驗用完一只工作液，避免反復(fù)凍融引起蛋白活性的降低。
