3-Mercaptopropionyl-Tyr-D-Trp-

二硫键 disulfide bond

又称S － S 键。是 2 个 SH 基间被氧化而形成的 -CH2 — S — S — CH2 形式的硫原子间的键。在生物化学的领域中，通常系指在肽和蛋白质分子中的胱氨酸残基中的键。此键在蛋白质分子的立体结构形成上起着一定的重要作用。为了确定蛋白质的一级结构，首先必须将二硫键打开，使成为线状多肽链。为此，需要在 2- 巯 - 乙醇、二硫苏糖类、巯基乙酸等的硫化合物与尿素那样的变性剂同时存在下使之发生作用，使还原成 SH 基（为了防止再氧化通常用适当的 SH 试剂将该基团烷基

Characterization of Single-Domain Antibodies with an Engineered Disulfide Bond

, the introduction of a disulfide bond into the hydrophobic core of camelid VHHs increased antibody thermal and conformational stability. Here, we present additional protocols for characterizing the effects of the introduced disulfide bond on a panel of llama VHHs

Improvement of Single Domain Antibody Stability by Disulfide Bond Introduction

into the elucidation of rules to uniformly increase stability of antibodies. Recently, a novel intra-domain disulfide bond was independently discovered by two research groups, after either rational design or careful investigation of the naturally occurring camelid