TABLE 2.

Yadav signature model and associated predicted substrates for metagenomic AT domains^a

AT domain	No. of occurrences of substrate in first 25 predicted substrates
	M	mM	M/mM	eM	2mB	3mB	G	B
Lib4b	1	19*		2	2		1
Lib7	24*		1
Lib10	24*		1

^aYadav signature model (34). The distribution of the first 25 results for substrate prediction by the SEARCHPKS tool (35) is shown. The first predicted substrate for each domain is indicated by an asterisk. Abbreviations: M, malonyl; mM, methylmalonyl; eM, ethylmalonyl; 2mB, 2-methylbutyryl; 3mB, 3-methylbutyryl; G, glyceryl; B, benzoyl.

^bDescribed as a loading domain.