Table 1. Mean phylogenetic distances (lower triangle) and standard error (upper triangle) of the catalytic regions among Lcb. reuteri GTFB (LR GTFB), streptococcal GTF groups, and 3 gtf genes from Str. mutans.

	root	WSG	WIG	INT	gtfB	gtfC	gtfD
LR GTFB		0.020	0.021	0.019	0.024	0.024	0.024
WSG	0.558		0.015	0.014
WIG	0.555	0.366		0.015
INT	0.571	0.393	0.381
gtfB	0.539					0.017	0.021
gtfC	0.560				0.144		0.022
gtfD	0.537				0.397	0.338

Abbreviations: WSG, water-soluble glucan-synthesizing group; WIG, water-insoluble glucan synthesizing group; INT, intermediate group (INT).