. 2021 Aug 3;11(8):2288. doi: 10.3390/ani11082288

Table 8.

Sources of amino acids in distal ileal digesta from three studies calculated by the Duvaux et al. [81] procedure.

Dietary Crude Protein (g/kg)	Sources of Amino Acids (%) in Ileal Digesta			Reference
Dietary Crude Protein (g/kg)	Dietary ¹	Endogenous ²	Microbial ³	Reference
213	48.3	28.9	22.8	Moss et al. [83]
222	56.4	24.2	19.3	Greenhalgh et. [84]
206	46	29.6	24.4	Greenhalgh et. [84]
187	46.1	30.1	23.8	Greenhalgh et. [84]
164	37.7	34.8	27.5	Greenhalgh et. [84]
204	60.9	22	17.1	Greenhalgh et. [84]
173	56.1	24.7	19.2	Greenhalgh et. [84]
174	45.8	30.4	23.8	Greenhalgh et. [84]
213	63	20.8	16.2	Chrystal et al. [38]
163	66.5	18.8	14.7	Chrystal et al. [38]
Mean	52.7	26.4	20.9

¹ Amino acid profile for dietary protein from tabulated references; ² Amino acid profile for endogenous protein from Ravindran and Hendriks [85]; ³ Amino acid profile for microbial protein from Parsons et al. [79], Miner-Williams et al. [80].