FIG. 2.

Genetic structure of the California CMV population based on SSCP analyses of different genomic regions. (A) The CMV 2b gene; (B) the CMV MP gene; (C) the RNA3 3′ NTR. Each lane contains a distinct SSCP pattern, which is considered a distinct haplotype, designated by the letter above the lane. Below each lane, the number of samples with that SSCP pattern is given (upper numbers), as well as the haplotype frequencies for group α and β isolates, respectively (lower numbers) (e.g., 0 + 1 means that no isolates in group α and 1 isolate in group β have pattern A). For the MP gene, those isolates without a KpnI site were digested by AccI; however, three isolates were digested neither by KpnI nor by AccI (lanes T and U).