Parameter (%)	Batch number								Method of analysis
	#1	#2	#3	#4	#5	#6	#20	#7
Tryptophan	0.98	1.03	0.98	1.01	1.14	1.14	0.94	1.01	AOAC 988.15
Cystine	0.45	0.42	0.46	0.46	0.48	0.48	0.55	0.45	AOAC 994.12 mod.
Methionine	0.93	0.87	0.84	0.86	0.91	0.93	0.72	0.87	AOAC 994.12 mod.
Aspartic acid	3.87	3.92	3.97	4.07	3.97	3.96	3.65	3.83	AOAC 982.30 mod.
Threonine	1.94	1.95	1.92	1.97	2.08	2.07	1.82	1.94	AOAC 982.30 mod.
Serine	1.93	1.96	1.87	1.88	2.03	2.05	1.79	1.98	AOAC 982.30 mod.
Glutamic acid	4.56	4.66	4.56	4.64	4.8	4.71	4.42	4.58	AOAC 982.30 mod.
Proline	2.06	2.09	1.98	2.04	2.15	2.18	1.75	2.06	AOAC 982.30 mod.
Glycine	2.41	2.39	2.34	2.39	2.47	2.47	2.01	2.35	AOAC 982.30 mod.
Alanine	2.76	2.6	2.56	2.61	2.87	2.85	2.35	2.74	AOAC 982.30 mod.
Valine	2.66	2.66	2.6	2.66	2.66	2.55	2.21	2.55	AOAC 982.30 mod.
Isoleucine	2.08	2.07	2.04	2.06	2.04	1.95	1.69	1.96	AOAC 982.30 mod.
Leucine	3.91	4.03	3.86	3.92	4.21	4.17	3.25	3.99	AOAC 982.30 mod.
Tyrosine	1.53	1.58	1.53	1.57	1.7	1.66	1.37	1.54	AOAC 982.30 mod.
Phenylalanine	2.48	2.51	2.4	2.45	2.62	2.58	2.27	2.40	AOAC 982.30 mod.
Total lysine	3.31	3.21	2.94	2.98	3.7	3.57	2.69	3.35	AOAC 982.30 mod.
Histidine	0.95	0.96	0.92	0.95	1	1	0.90	0.95	AOAC 982.30 mod.
Arginine	3.25	3.17	3	2.96	2.87	2.79	4.17	3.01	AOAC 982.30 mod.

AOAC: Association of Official Analytical Collaboration.