FIG. 2.

Phylogenetic relationships of cbbL genes retrieved from Mono Lake. The tree was constructed with the ARB program using full-length (772-bp) sequences, bootstrap analysis was performed (values of >50% are shown), and then shorter sequences were inserted. Sampling depth is indicated as the first set of numbers in the clone identifier; for example, for clone ML2J-16R, ML = Mono Lake; 2 = sampling depth in meters; J = month sampled (July); 16R = clone number from that library. GenBank accession numbers and lengths of partial sequences are given in parentheses following the clone identifier.