Skip to main content
. 2017 Mar 10;8(2):362–381. doi: 10.3945/an.116.013896

TABLE 3.

Use of porcine data to extrapolate daily amino acid requirements for maintenance and growth of an 8-kg child and comparison with amounts provided by consumption of 208 g corn/d to compute net daily amino acid balance1

Corn
 Maintenance
 Growth
 Total2
Indispensable amino acid Content,3 % as SID Content, ratio:Lys Consumed, g SID/d SID REQT,4 mg/kg MBW Amino acid, ratio:Lys SID REQT, g/d Ideal pattern,5 g/100 g Lys Net REQT,6 g/d SID REQT,7 g/d SID REQT,6 g/d Net balance, g/d
Lys 0.159 1.00 0.331 71.1 1.00 0.34 100 0.13 0.21 0.55 −0.22
Arg 0.271 1.70 0.56 38.6 0.54 0.18 90 0.12 0.15 0.34 0.23
His 0.166 1.04 0.35 25.0 0.35 0.12 45 0.06 0.07 0.19 0.16
Ile 0.189 1.19 0.39 62.3 0.88 0.30 51 0.07 0.10 0.40 −0.01
Leu 0.715 4.50 1.49 88.8 1.25 0.42 100 0.13 0.21 0.63 0.86
Met 0.119 0.75 0.25 19.7 0.28 0.09 28 0.04 0.06 0.15 0.09
Phe 0.332 2.08 0.69 64.3 0.90 0.31 52 0.07 0.14 0.44 0.25
Thr 0.184 1.16 0.38 97.3 1.37 0.46 53 0.07 0.11 0.57 −0.19
Trp 0.045 0.28 0.09 27.0 0.38 0.13 13 0.02 0.03 0.16 −0.07
Val 0.261 1.64 0.54 83.9 1.18 0.40 66 0.09 0.13 0.53 0.01
1

For illustration purposes only, and not intended for direct application in human nutrition. MBW, metabolic body weight; REQT, requirement; SID, standardized ileal digestible.

2

Maintenance plus gain.

3

Corn (International Feed No. 4–02–861, 7.2% crude protein) amino acid composition presented as SID amounts from the NRC swine model, 2012 (23). SID represents the amounts of amino acids that are absorbed and available for metabolic use.

4

Maintenance estimates taken from Tables 2–7 of the NRC swine model, 2012 (23). MBW = kg0.75. This REQT represents the absolute physiologic need corrected for efficiency of utilization of the absorbed amino acid.

5

Ideal pattern for each amino acid relative to Lys, taken from Tables 2–8 of the NRC swine model, 2012 (23).

6

Net tissue REQT for Lys computed based on 380 g body weight gain/mo and 15% protein in gain and 7.1 g lysine/100 g protein gain. Net tissue REQT for other amino acids computed by multiplying their ideal ratio to Lys × net Lys REQT.

7

SID REQT for all amino acids computed by dividing net REQT by efficiency of absorbed amino acid use for tissue deposition (23).