Table 3.

DNA strand-exchange proteins select for DNA sequences that are primarily G-rich, and under-represented for A and C residues

	Trinucleotide frequency (%)
RecAaa	GTG (7.6)	TGG (7.6)	GTT (6.3)	GGT (6.0)
ScRad51b	GTG (10.4)	TGG (7.2)	TGT (7.4)	GGT (7.0)
HsRad51c	GTG (17.3)	GGG (12.8)	TGT (9.3)	GGT (7.8)

Shown are the four most frequently occurring trinucleotides found in the selected DNA for the three DNA strand exchange proteins examined: E.coli RecA, S.cerevisiae Rad51 and H.sapiens Rad51 proteins. The bias for trinucleotides composed exclusively of G and T residues is evident.

^aTracy and Kowalczykowski (2); ^bTracy, et al. (3); and ^cthis work.