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重要文件

T1021

Sigma-Aldrich

Trypsin inhibitor

powder, suitable for isoelectric focusing (IEF)

同義詞:

SBTI

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About This Item

CAS號碼:
EC號碼:
MDL號碼:
分類程式碼代碼:
12352200
NACRES:
NA.77

產品名稱

胰蛋白酶抑制剂 来源于大豆, Isoelectric focusing marker, pI 4.6

生物源

Glycine max (soybean)

品質等級

形狀

powder

分子量

20,100 Da

技術

isoelectric focusing (IEF): suitable

pI 

4.6

溶解度

balanced salt solution: 1 mg/mL
concentrate: >10 mg/mL, hazy, amber-yellow
phosphate buffer: 10 mg/mL
water: 10 mg/mL
serum-free medium: soluble

運輸包裝

ambient

儲存溫度

−20°C

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生化/生理作用

该抑制剂能够在较小程度上抑制胰蛋白酶、胰凝乳蛋白酶和纤溶酶。它还能抑制蛋白酶血浆激肽释放酶和凝血因子X,机制与抑制胰蛋白酶类似。胰蛋白酶抑制剂不会抑制金属蛋白酶、基于组织的激肽释放酶、酸性蛋白酶或硫代蛋白酶。该抑制剂通过与蛋白酶活性位点按1:1化学计量形成复合物,然后在抑制剂上切割单个精氨酸-异亮氨酸键。抑制作用是可逆的且具有pH依赖性。

成分

The soybean trypsin inhibitor is a monomeric protein containing 181 amino acid residues in a single polypeptide chain crosslinked by two disulfide bridges.

單位定義

一个胰蛋白酶单位是指在25°C、pH 7.6条件下,以N-α-苯甲酰基-L-精氨酸乙酯(BAEE)为底物,每分钟产生0.001的 A253所需的酶量。
One trypsin unit = A253 of 0.001 per minute with N-alpha-benzoyl-L-arginine ethyl ester (BAEE) as substrate at pH 7.6 at 25 °C.

準備報告

胰蛋白酶抑制剂能够以10 mg/mL溶于水和磷酸盐缓冲液。它能够以1 mg/mL溶于平衡盐溶液和无血清培养基中。浓度大于10 mg/mL的浓缩液可能浑浊,呈黄色至琥珀色。使用胰蛋白酶消化细胞后,重悬于胰蛋白酶抑制剂溶液中,使得用于解离的胰蛋白酶溶液浓度达到1 mg/mL。然后将细胞悬浮液以1000rpm离心,得到细胞沉淀。

在2-8℃下短期储存时,溶液可保持活性。溶液分装后可在-20℃冷冻并保持稳定。

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分析證明 (COA)

Lot/Batch Number

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條款

Natural trypsin inhibitors (serpins) regulate protein activation and catabolism by inhibiting serine proteases in vivo.

天然胰蛋白酶抑制劑(serpins)透過抑制體內的絲氨酸蛋白酶來調節蛋白質的活化和分解。

Chromatograms

application for HPLC

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