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Author:
Journal / Book Title:
Year:
Volume:
Issue:
qing mei su de zuo yong ji zhi
Author(s):
XU Jien
Pages:
53
-
56
Year:
1979
Issue:
4
Journal:
Chinese Journal of Antibiotics
Keyword:
作用机制
;
耐药菌
;
噻唑环
;
头抱菌素
;
噻嗪
;
内酞胺
;
共价结合
;
活性部位
;
六元
;
蛋白变性
;
Abstract:
<正> 青霉素和头孢菌素是两大β-内酰胺类抗生素。四元β-内酰胺与五元的噻唑环结合为青霉素,与六元的噻嗪环结合为头孢菌素。 临床广泛应用青霉素导致耐药菌株的出现和扩散。由于耐药性几乎为产生β-内酰胺酶所致,因而促进了对能耐受β-内酰胺酶破坏的衍生物研究。现已找到一些能耐β-内酰胺酶的青霉素和头孢菌素,也发现能使
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