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[动脉壁中的糖缀合物生物合成。VIII. 微粒体唾液酸转移酶中分子类型的分离]

[Glycoconjugate biosynthesis in the arterial wall. VIII. Separation of molecular types in microsomal sialyltransferase].

作者信息

Guidollet J, Louisot P

出版信息

Paroi Arterielle. 1981;7(3):91-6.

PMID:7339543
Abstract

Sialyltransferase activity of the intima-media of arterial walls is located in microsomes. The solubilization of enzyme by Triton X-100, purification by chromatography and isoelectric focusing lead to two isoenzymes (pHi 4.5 and 6.4), the second is widely predominant. Aortic sialyltransferase is sensitive to nucleotides, Mn++ dependent, and the affinity for substrate N-acetyl-neuraminic acid is 300 microM.

摘要

动脉壁中膜的唾液酸转移酶活性位于微粒体中。用Triton X-100使酶溶解，通过色谱法和等电聚焦进行纯化，得到两种同工酶（等电点分别为4.5和6.4），其中第二种同工酶占主导地位。主动脉唾液酸转移酶对核苷酸敏感，依赖于Mn++，对底物N-乙酰神经氨酸的亲和力为300微摩尔。

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