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. 2016 Sep 20;8(9):573. doi: 10.3390/nu8090573

Table 4.

Plasma amino acid concentration (µmol/mL) of Sprague-Dawley rats fed different types of protein after a protein restricted period.

AMINO ACIDS (µmol/mL) LP C S B BCr SCr Cr
Asp 0.045 ± 0.001 c 0.078 ± 0.003 a 0.061 ± 0.002 b 0.057 ± 0.003 bc 0.055 ± 0.004 bc 0.059 ± 0.002 bc 0.056 ± 0.03 bc
Glu 0.24 ±0.008 b 0.26 ±0.006 a 0.24 ± 0.005 b 0.23 ± 0.001 b 0.17± 0.003 c 0.23 ± 0.006 b 0.18 ± 0.004 c
Ser 0.56 ± 0.01 c 0.92 ± 0.03 ab 1.08 ± 0.06 a 0.88 ± 0.02 b 0.83 ± 0.02 b 0.97 ± 0.03 ab 0.91 ± 0.05 ab
His 0.055 ± 0.001 b 0.100 ± 0.006 a 0.095 ± 0.004 a 0.079 ± 0.004 ab 0.060 ± 0.005 b 0.102 ± 0.008 a 0.063 ± 0.006 b
Gly 0.76 ± 0.01 c 0.74 ± 0.02 c 0.94 ± 0.02 b 1.08 ± 0.02 a 0.66 ± 0.02 dc 0.65 ± 0.02 dc 0.56 ± 0.02 d
Thr 0.19 ± 0.03 b 0.27 ± 0.05 ab 0.37 ± 0.06 ab 0.37 ± 0.02 ab 0.31 ± 0.07 ab 0.41 ± 0.05 a 0.46 ± 0.02 a
Arg 0.02 ± 0.002 c 0.19 ± 0.001 a 0.12 ± 0.016 b 0.15 ± 0.011 ab 0.14 ± 0.012 b 0.21 ± 0.004 a 0.16 ± 0.015 ab
Ala 1.53 ± 0.03 cd 1.68 ± 0.05 bc 2.13 ± 0.06 a 1.78 ± 0.04 b 1.34 ± 0.05 d 1.50 ± 0.07 cd 1.39 ± 0.02 d
Val 0.070 ± 0.006 d 0.324 ± 0.016 a 0.271 ± 0.009 ab 0.242 ± 0.012 bc 0.205 ± 0.008 c 0.237 ± 0.013 bc 0.215 ± 0.009 c
Met 0.11 ± 0.009 ab 0.15 ± 0.010 a 0.11 ± 0.007 ab 0.10 ± 0.007 b 0.10 ± 0.005 b 0.12 ± 0.009 ab 0.12 ± 0.010 ab
Cys 0.607 ± 0.004 c 0.695 ± 0.013 b 0.891 ± 0.027 a 0.768 ± 0.016 b 0.528 ± 0.008 de 0.575 ± 0.012 d 0.471 ± 0.022 e
Phe 0.043 ± 0.004 b 0.111 ± 0.009 a 0.111 ± 0.005 a 0.109 ± 0.008 a 0.108 ± 0.003 a 0.113 ± 0.006 a 0.119 ± 0.006 a
Tyr 0.040 ± 0.002 d 0.185 ± 0.005 ab 0.170 ± 0.008 ab 0.140 ± 0.008 c 0.145 ± 0.005 bc 0.190 ± 0.015 a 0.191 ± 0.003 a
Ile 0.046 ± 0.002 d 0.118 ± 0.004 a 0.123 ± 0.04 a 0.096 ± 0.002 b 0.072 ± 0.03 c 0.083 ± 0.05 bc 0.066 ± 0.004 c
Leu 0.060 ± 0.005 d 0.201 ± 0.006 b 0.179 ± 0.008 bc 0.156 ± 0.003 c 0.201 ± 0.011 b 0.230 ± 0.011 a 0.259 ± 0.012 a
Lys 0.30 ± 0.006 cd 0.49 ± 0.012 ab 0.51 ± 0.022 a 0.42 ± 0.012 b 0.28 ± 0.016 d 0.35 ± 0.012 bc 0.17 ± 0.014 e
Pro 0.31 ± 0.01 c 0.68 ± 0.02 a 0.48 ± 0.001 b 0.34 ± 0.02 c 0.45 ± 0.01 b 0.39 ± 0.02 c 0.51 ± 0.001 b
Trp 0.036 ± 0.003 b 0.093 ± 0.008 a 0.078 ± 0.004 a 0.031 ± 0.002 b 0.024 ± 0.003 b 0.037 ± 0.005 b 0.018 ± 0.003 c
Asn 0.032 ± 0.001 c 0.065 ± 0.03 b 0.116 ± 0.007 a 0.70 ± 0.004 b 0.75 ± 0.005 b 0.108 ± 0.03 a 0.081 ± 0.001 b
Gln 0.81 ± 0.01 c 0.89 ± 0.001 a 0.88 ± 0.001 a 0.84 ± 0.001 bc 0.72 ± 0.001 d 0.87 ± 0.01 ab 0.71 ± 0.01 d
ΣBCAA 0.526 ± 0.004 d 1.929 ± 0.03 a 1.722 ± 0.022 b 1.481 ± 0.022 c 1.432 ± 0.022 c 1.653 ± 0.026 b 1.620 ± 0.030 b
ΣIAA 1.909 ± 0.01 e 4.666 ± 0.02 a 3.993 ± 0.02 c 3.994 ± 0.02 c 3.684 ± 0.02 d 4.692 ± 0.02 a 4.462 ± 0.03 b

ΣBCAA = The sum of the concentration of the three branched chain amino acids Val, Leu, Ile. ΣIAA = The sum of the concentration of the amino acids Thr, Val, Ile, Leu, Met, Phe, Trp, Lys, His, Arg. C: casein; LP: low protein; S: soy protein; B: black bean protein; Cr: corn protein; BCr: black bean protein + corn protein; SCr: Soy protein + corn protein. Different letter superscript indicates significant differences among groups, p < 0.05, a > b > c.