Table 3.

Amino acid composition of DPP.

Amino Acids	3 Letter Code	1 Letter Code	DPP	DPP	DPP	DPP	DPP
Alanine	ala	A	2.14–8.36	2.61	6.48	2.71	2.43–8.27
Arginine	arg	R	1.18–1.73	1.61	5.77	1.42	1.18–1.74
Aspartic acid	asp	D	4.48–3.13	3.55	10.41	1.53	3.23–4.70
Cysteine	cys	C	N/A	0.42	1.11	0.91	N/A
Glutamine	gln	Q	2.58–4.66	1.74	13.23	2.23	3.91–4.71
Glycine	gly	G	8.46–7.81	2.24	5	1.81	4.40–8.19
Histidine	his	H	1.14–1.64	1.61	2.53	1.89	0.82–1.84
Isoleucine	ile	I	2.38–1.54	1.49	4.37	1.51	1.39–2.57
Leucine	leu	L	3.65–2.21	3.34	8.35	3.51	1.99–3.72
Lysine	lys	K	1.92–3.21	2.95	7.73	2.81	2.87–3.77
Methionine	met	M	0.41–6.64	0.11	2.37	0.14	0.50–0.80
Phenylalaline	phe	F	1.19–1.87	1.63	4.25	1.73	1.15–1.90
Proline	pro	P	1.53–2.04	0.28	N/A	N/A	1.73–2.28
Serine	ser	S	0–1.88	1.89	5.74	0.45	0.72–1.92
Threonine	thr	T	0.55–1.46	1.72	4.7	1.66	0.62–1.91
Tryptophan	trp	W	N/A	N/A	N/A	N/A	N/A
Tyrosine	tyr	Y	0.01–0.16	1.55	3.46	0.82	0.37–1.53
Valine	val	V	2.77–1.88	1.81	5.16	1.92	1.24–2.80
References			Bishr and Desoukey [13]	H. M. Hassan [10]	Sebii et al. [35]	Basuny et al. [36]	Aly [76]