TABLE 3.

Composition of pufM gene clone libraries constructed in summer and in winter^a

Group	% Similarity (mean ± SD)	n	% of pufM clones
			Summer	Winter
E	95 ± 4	10	4	38
F	99 ± 1	27	65	50
I	96 ± 2	9	31	12

^aAccording to the classification proposed by Yutin et al. (59).