[Nucleotide sequence of gene 31 of the T4 bacteriophage].

We have determined the nucleotide sequence of a region of 656 nucleotides comprising the 31 gene of bacteriophage T4. The coding region consisted of 333 nucleotides directing the synthesis of a polypeptide of 111 amino acids, with a calculated molecular weight of 12,060. The upstream sequence contains the consensus sequences for T4 early and two middle promoters. The downstream sequence contains the consensus sequence for T4 late promoter and the inverted repeats. In addition, there are two incomplete open reading frames in the sequenced region.