Fig. 2.

The restriction map of bacteriophage T4 and its alignment with the genetic map. The positions of BglII, XhoI, PstI, HindIII and EcoRI sites are taken from our own data. The order of most of the SalI, and KpnI fragments is as determined by Carlson (1979). Our data confirmed her order, identified an additional fragment, and defined the alignment of the SalI and KpnI sites with other restriction sites and with the genetic map. The SmaI positions were defined by aligning of the map derived by Kiko et al. (1979) with our map. The genetic map was modified from the map of Wood and Revel (1976) primarily according to data summarized by Mosig (1980). The positions of the genetic markers have been further adjusted to correspond to the physical map according to data from cloned DNA fragments as summarized in Table 5