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Table 3 Concentrations of L- and D-amino acids in the plasma of Djungarian and Roborovskii hamsters during light and dark periods

From: Metabolism of amino acids differs in the brains of Djungarian hamster (P. sungorus) and Roborovskii hamster (P. roborovskii)

  Amino acids

Djungarian hamster

Roborovskii hamster

Results of ANOVA

 

Light

Dark

Light

Dark

Species

Time

Interaction

Essential amino acids

      

  L-Valine

318 ± 24

316 ± 9

348 ± 37

410 ± 35

P < 0.05

NS

NS

  L-Histidine

125 ± 4

136 ± 3

105 ± 3

112 ± 9

P < 0.01

NS

NS

  L-Methionine

75.3 ± 3.7

65.1 ± 4.3

80.6 ± 5.7

87.0 ± 3.6

P < 0.01

NS

NS

  L-Tryptophan

54.6 ± 3.2

54.0 ± 6.5

25.6 ± 2.7

90.8 ± 7.3

NS

P < 0.01

P < 0.01

  L-Phenylalanine

101 ± 3

104 ± 7

129 ± 2

145 ± 10

P < 0.01

NS

NS

  L-Leucine

235 ± 17

242 ± 6

206 ± 10

274 ± 25

NS

P < 0.05

NS

  L-Isoleucine

143 ± 10

142 ± 3

134 ± 10

162 ± 15

NS

NS

NS

Nonessential amino acids

      

  L-Serine

290 ± 27

324 ± 21

374 ± 17

432 ± 13

P < 0.01

P < 0.05

NS

  Taurine

402 ± 49

326 ± 39

467 ± 20

435 ± 45

P < 0.05

NS

NS

  L-Aspartic acid

19.0 ± 2.5

13.7 ± 0.7

20.6 ± 2.4

21.2 ± 2.6

NS

NS

NS

  L-Alanine

579 ± 19

634 ± 57

706 ± 20

847 ± 70

P < 0.01

NS

NS

  D-Alanine

12.6 ± 2.6

8.0 ± 0.9

7.1 ± 0.8

5.6 ± 0.6

P < 0.01

P < 0.05

NS

  L-Glutamine

956 ± 66

1199 ± 66

1159 ± 18

1176 ± 89

NS

NS

NS

  L-Arginine

216 ± 20

247 ± 8

213 ± 14

296 ± 86

NS

NS

NS

  D-Methionine

6.23 ± 0.47

6.86 ± 0.69

7.85 ± 0.58

9.71 ± 1.25

P < 0.05

NS

NS

  L-Tyrosine

102 ± 7

90 ± 7

96 ± 6

105 ± 8

NS

NS

NS

  D-Tyrosine

25.9 ± 2.8

20.1 ± 1.5

21.9 ± 0.9

21.7 ± 1.8

NS

NS

NS

  1. Values are means ± S.E.M. in nmol/ml for plasma; n = 5–7 in each group; NS: Not significant.