Several new bacteriophage T4 genes, mapped by sequencing deletion endpoints between genes 56 (dCTPase) and dda (a DNA-dependent ATPase-helicase) modulate transcription.

Abstract excerpt

We have analyzed DNA of wild-type T4 and of 13 independent large viable deletions isolated by Homyk and Weil (Virology 61 (1974) 505-523) and by Little (Virology 53 (1973) 47-59), by sequencing, cloning, and expression studies. The deletions can be explained by illegitimate recombination between short (4- to 15-bp) ectopic repeats. In four deletions, adjacent regions are partially homologous, and in at least one...

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