FIG. 1.

(A) Restriction map of HCMV strain Towne showing the location of the morphological transforming regions, mtrI, mtrII, and mtrIII. mtrI has been identified in strain AD169. mtrII, also designated UL111A, contains an ORF encoding the 79-aa protein. Adapted from reference 127 with permission of the publisher. (B) The XbaI-BamHI EM fragment of strain Towne showing the BanII-XhoI (mtrII 980) fragment with its encoded proteins. The solid open, and shaded rectangles represent the 79-, 83-, and 34-aa proteins, respectively. (C) ORFs of the mtrII 980 colinear regions of strains AD169 and Tanaka. The analogous amino acid sequences of strains AD169 and Tanaka are shown (the same rectangle symbols are used as those shown for the proteins of strain Towne). XXX, sequences not found in the proteins of strain Towne.