Lysogenization of Mycobacteria

Effects of the Unrelated Phage upon Lysogenization

われ わ れ は フ ァー ジ ε15がS. anatumに 感 染 した 場 合, 数 代 の細 胞 分 裂 を経 て か らプ ロフ ァー ジ に な るの に (Uetake et al., 1958), ε34がA(ε15) に感 染 した 場 合 に は平 均1回 の細 胞 分裂 以 内 に プ ロ フ ァー ジ とな る (萩 原, 1959, 植 竹, 萩 原, 1959) こ とを経 験 した. 感 染 後 す ぐ に プ ロフ ァー ジ に な る フ ァー ジ (P1, ε34) もあ り, プ ロ フ ァ ー ジに な る ま で に時 間 を要 す る フ ァー ジ (P22, ε15) も あ る こ とは 明 か で あ るが (Bertani, 1958参 照), これ を簡 単 に フ ァー ジ だ け の 固有 の性 状 と き めて し ま え る...

Control of lysogenization by phage P22. II. Mutations (clyA) in the cl gene that cause increased lysogenization.

(Received 10 NovembPr IYSO, and in revised form 24 April 19X1) p12 cly mutants lysogenize at very high frequency after infection of wild-type Salmonella. One class of P22 cly mutations, clyA mutations, are shown to map within the P22 cl gene and to increase the activity of t,he cl gene product during establishment of lysogeny. The P22 clyil mutations also appear to affect c%-repressor gene expr...

Mutations of phage P22 affecting phage DNA synthesis and lysogenization.

Two temperature-sensitive mutants of phage P22, ts18.1 and ts12.1, are described which have recessive DNA-negative phenotypes. At high temperature they fail to synthesize phage DNA. In mixed infection with the two mutants or either mutant and wild-type phage, DNA synthesis and phage production are normal. In addition, under non-permissive conditions, these mutants fail to lysogenize and show do...

Intermediary metabolism of mycobacteria.

Microculture morphology of mycobacteria.

Morphology continues to be indispensable for primary isolation and recognition of bacteria. Under controlled conditions of growth, microscopic and gross characteristics of most bacterial species are constant, replicable, and have high differential values. This report is concerned with microculture morphology of Mycobacterium 13 mm) was then placed over each planted area. The plates were incubat...