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噬菌体感染后大肠杆菌的增大。II. 提出的机制。

Enlargement of Escherichia coli after bacteriophage infection. II. Proposed mechanism.

作者信息

Freedman M L, Krisch R E

出版信息

J Virol. 1971 Jul;8(1):95-102. doi: 10.1128/JVI.8.1.95-102.1971.

Abstract

Division of Escherichia coli was stopped and mean cellular volume was increased after infection with T-even phage. This host cell enlargement was temperature-dependent, cyanide-sensitive, and stable in the presence of hypertonic medium. Enlargement ceased at about the same time that energy metabolism ceased. Initially, enlargement was accompanied by a decrease in mean cell density. Tritiated 2, 6-diaminopimelic acid was accumulated and incorporated into cold acid-insoluble material at the preinfection rate. These findings suggest that the effect on host cell size is only in part an osmotic phenomenon and that it also reflects continued growth of the surface of the infected cell in the absence of cell division.

摘要

用T偶数噬菌体感染后,大肠杆菌的分裂停止,平均细胞体积增加。这种宿主细胞的增大是温度依赖性的,对氰化物敏感,并且在高渗培养基存在下是稳定的。增大在能量代谢停止的大致相同时间停止。最初,增大伴随着平均细胞密度的降低。氚标记的2,6-二氨基庚二酸以感染前的速率积累并掺入冷酸不溶性物质中。这些发现表明,对宿主细胞大小的影响部分只是一种渗透现象,并且它还反映了在没有细胞分裂的情况下被感染细胞表面的持续生长。

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