TABLE 2.

Homology of the proteins encoded by the S. gordonii fructose PTS operon (FruR, FruK, and FruI), the proteins of other oral streptococci, and LacR, LacC, and FruA of Lactococcus lactis subsp. lactis

Organism	% Identity (% similarity) with the following S. gordonii proteins:
	FruR	FruK	FruI
Streptococcus pneumoniae	69.6 (81.4)	86.1 (90.4)	81.6 (90.2)
Streptococcus mitis	69.0 (81.0)	87.2 (91.1)	81.6 (90.2)
Streptococcus agalactiae	53.2 (66.9)	74.6 (82.5)	77.7 (85.7)
Streptococcus mutans	58.4 (72.4)	74.3 (82.2)	75.8 (83.7)
Streptococcus pyogenes	54.3 (70.4)	72.3 (82.8)	77.2 (83.9)
Lactococcus lactis subsp. lactis	42.0 (57.2)	53.7 (66.8)	67.0 (79.8)