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    • 4. 发明授权
    • Immobilization of SH group-containing compounds in the presence of a sulfite-containing antioxidant
    • 含硫基化合物在含亚硫酸盐的抗氧化剂存在下的固定化
    • US06252054B1
    • 2001-06-26
    • US09444305
    • 1999-11-22
    • Eiji OginoTakehiro NishimotoMichio Nomura
    • Eiji OginoTakehiro NishimotoMichio Nomura
    • C07K1702
    • C07K17/02G01N33/54393Y10S530/811Y10S530/812Y10S530/813Y10S530/814Y10S530/815
    • Immobilization of SH group-containing compounds on a solvent-insoluble support is carried out in the presence of an antioxidant to prevent oxidation of SH groups to S—S bonds. This improves immobilization efficiency and suppresses deterioration of inherent characteristics of the SH group-containing compound. Antioxidants include sodium pyrosulfite (sodium disulfite), sodium sulfite, sodium hydrogensulfite, sodium hydrosulfite and L-ascorbic acid. SH group-containing compounds include cysteine, peptides or proteins containing cysteine and thiol compounds such as ethanethiol, aminoethanethiol, benzylthiol and thiophenol. Preferably, the SH group-containing compound has a molecular weight not more than 3×104. The support may be activated by a functional group such as glycidyl, imidocarbonato, tosyl, tresyl, carboxyl, amino, azido or hydroxyl. The support can be inorganic such as glass beads or organic such as a synthetic polymer or a polysaccharide.
    • 在溶剂不溶性载体上固定含SH基团的化合物在抗氧化剂存在下进行,以防止SH基团氧化成S-S键。 这提高了固定效率并抑制含SH基化合物的固有特性的劣化。 抗氧化剂包括焦亚硫酸钠(亚硫酸氢钠),亚硫酸钠,亚硫酸氢钠,连二亚硫酸钠和L-抗坏血酸。 含SH基团的化合物包括半胱氨酸,含有半胱氨酸和巯基化合物的肽或蛋白质,例如乙硫醇,氨基乙硫醇,苄硫醇和苯硫酚。 优选地,含SH基团的化合物的分子量不大于3×10 4。 载体可以被诸如缩水甘油基,亚氨基碳酸根,甲苯磺酰基,甲酚基,羧基,氨基,叠氮基或羟基之类的官能团活化。 载体可以是无机的,例如玻璃珠或有机如合成聚合物或多糖。