. 2014 Oct 22;9(10):e111311. doi: 10.1371/journal.pone.0111311

Table 3. Effect of side chain properties of the terminal amino acid on utilization of dipeptides by the SBP penta mutant complemented with plasmids harboring an individual dipeptide-binding protein.

Dipeptide utilization by SBPs^a		2^nd amino acid															Total (N-terminal)
		nonpolar					acidic					uncharged
		A1	A2	A3	A4	A5	A1	A2	A3	A4	A5	A1	A2	A3	A4	A5	A1	A2	A3	A4	A5
1^st amino acid	nonpolar	32	34	27	32	1	11	11	11	10	0	10	10	9	9	0	53	55	47	51	1
	acidic	4	6	4	3	0	0	0	0	0	0	1	2	1	1	0	5	8	5	4	0
	uncharged	7	7	7	7	1	5	5	5	5	0	2	2	2	2	0	14	14	14	14	1
	Total (C-terminal)	43	47	38	42	2	16	16	16	15	0	13	14	12	12	0	72	77	66	69	2

The number includes only dipeptides that were not used by the SBP penta mutant.