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品質等級
種類
Type VII
形狀
essentially salt-free, lyophilized powder
比活性
≥40 units/mg protein
分子量
25 kDa
溶解度
1 mM HCl: soluble 10 mg/mL, clear
UniProt登錄號
儲存溫度
−20°C
基因資訊
cow ... CTRB1(618826)
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相关类别
應用
用 Sigma 公司的 α-糜蛋白酶与蝗虫游走蛋白 (Locusta migratoria) 形成复合物，测定了两个同源抑制剂（大脑间部主肽-C 和大脑间部主肽-D2v）的晶体结构。
生化／生理作用
α-糜蛋白酶是一种丝氨酸肽酶，在由二硫键连接的三条多肽链（a 链-13 残基、B 链-131 残基和 C 链-97 残基）中含有 241 个氨基酸残基。发现该酶的分子量为 25 kDa。其 pI 为 8.75。选择性水解酪氨酸、苯丙氨酸、色氨酸和亮氨酸 C 末端的肽键。ca2+ 激活并稳定酶。该酶被二异丙基氟磷酸盐 (DFP)、苯甲基磺酰氟 (PMSF)、N-对甲苯磺酰基-L-苯丙氨酸氯甲基酮 (TPCK)、糜蛋白酶抑制剂、抑肽酶、α1-抗胰蛋白酶、α2-巨球蛋白、10 mM cu2 + 和 hg2 + 抑制。
一种丝氨酸蛋白酶，能将与芳香烃或其他大型疏水性侧链（Tyr、Trp、Phe、Met、Leu）结合的肽从键的羧基端水解。
單位定義
在 pH 值为 7.8、25°C 条件下，1 个单位每分钟水解 1.0 μmol BTEE。
準備報告
TLCK处理灭活可能存在于胰凝乳蛋白酶中的胰蛋白酶，而不影响胰凝乳蛋白酶活性。
分析報告
通过 A1%/280 测定蛋白
其他說明
基底
产品编号
说明
价格
抑制劑
产品编号
说明
价格
訊號詞
Danger
危險分類
Acute Tox. 4 Oral - Aquatic Acute 1 - Eye Irrit. 2 - Resp. Sens. 1 - Skin Irrit. 2 - STOT SE 3
標靶器官
Respiratory system
儲存類別代碼
11 - Combustible Solids
水污染物質分類（WGK）
WGK 1
個人防護裝備
dust mask type N95 (US), Eyeshields, Faceshields, Gloves
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The crystal structures of two homologous inhibitors (PMP-C and PMP-D2v) from the insect Locusta migratoria have been determined in complex with bovine alpha-chymotrypsin at 2.1- and 3.0-A resolution, respectively. PMP-C is a potent bovine alpha-chymotrypsin inhibitor whereas native PMP-D2 is
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商品
Analytical Enzyme Chymotrypsin: Chymotrypsin is produced in the acinar cells of the pancreas as the inactive precursor, chymotrypsinogen.
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