Figure 4.

Cryptic prophages of M. tuberculosis H37Rv. Portions of two segments of the M. tuberculosis H37Rv genome present in cosmids MYCY441 (φRv2) and MTCY336 (φRv1) are shown (accession nos. Z80225 and Z95586, respectively). Horizontal bars represent the genomes with markers at 1-kilobase intervals; numbers correspond to the cosmid coordinates. Genes are shown either above or below the bar, depending on the direction of transcription, with genes below transcribed leftward. Related genes are shown in similar colors. Putative attachment junctions, attL and attR, delineate the boundaries of the cryptic prophages φRv2 and φRv1. The location of genes and their putative functions are from annotations by the Sanger Center, Cambridge, U.K.