Methionine to cystine ratio in the total sulfur amino acid requirements and sulfur amino acid metabolism using labelled amino acid approach for broilers

Table 5 15 N-Met recoveries from compound-specific stable isotope (CSIA) analysis

δ¹⁵N-Met^a	¹⁵N-Met intake (mg)	Body	Breast	Liver	Feather	Excreta	Total	Rec (%)
δ¹⁵N-Met^a	¹⁵N-Met intake (mg)	¹⁵N-Met retention (¹⁵N-Met_R, mg)						Rec (%)
L-(¹⁵N)-Met
44:56	107.41 ± 0.58	38.54 ± 1.71	7.04 ± 0.07	1.78 ± 0.20	4.94 ± 0.40	21.19 ± 1.65	73.50 ± 1.42	68.4 ± 1
50:50	102.80 ± 2.77	35.16 ± 1.71	7.30 ± 0.13	1.70 ± 0.06	3.87 ± 0.20	20.01 ± 0.87	68.04 ± 1.73	66.2 ± 0
56:44	102.59 ± 4.90	31.31 ± 2.34	6.43 ± 0.27	0.75 ± 0.50	4.09 ± 0.51	18.44 ± 1.04	61.02 ± 3.19	59.6 ± 4

^a Results from compound-specific stable isotope analysis using labelled methionine (CSIA)

ISSN: 1746-6148