a simple protein found in fish sperm; rich in arginine; simpler in composition than globulin or albumin; counteracts the anticoagulant effect of heparin
Protamines are small, arginine-rich, nuclear proteins that replace histones late in the haploid phase of spermatogenesis and are believed essential for sperm head condensation and DNA stabilization. They may allow for denser packaging of DNA in spermatozoon than histones, but they must be decompressed before the genetic data can be used for protein synthesis.
例句与用法
1.
Protamine zinc insulin 精蛋白锌胰岛素
2.
Insulin zinc protamine 精蛋白锌胰岛素
3.
Transfection efficiency comparison of cationic liposome - dna complexes and lipid - protamine - dna complexes in vitro 复合物体外细胞转染率比较
4.
The results showed : protamine could inhibit the growth of " bacillus subtilis " without destroying the cellular wall and significantly inhibit the activities of succinate dehydrogenase and malata dehydrogenase 试验结果表明：鲤鱼鱼精蛋白对枯草芽袍杆菌具有较强的抑制作用，但对枯草芽抱杆菌细胞壁不产生破坏作用；对黑曲?胞内的琥珀酸脱氢酶和苹果酸脱氢酶的活性具有明显的抑制作用。
5.
In order to investigate the antibacterial mechanism of protamine , the effect of protamine on the growth of " bacillus subtilis " and the activities of succinate dehydrogenase ( sdh ) and malata dehydrogenase ( mdh ) in cells of " aspergillus niger " was studied 通过鲤鱼鱼精蛋白对枯草芽抱杆菌生长的影响及对黑曲?胞内的琥珀酸脱氢酶( sdh )和苹果酸脱氢酶( mdh )活性影响的研究，探讨鲤鱼鱼精蛋白的抑菌机理。
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