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Table 1 Concentrations of amino acids, agmatine, and polyamines in maternal plasma (nmol/mL)

From: Pre-implantation exogenous progesterone and pregnancy in sheep: I. polyamines, nutrient transport, and progestamedins

  Effect
  Day 9 Day 12
Nutrient CO P4 CO P4
Amino Acid
 Alanine 208.8 ± 26 170.7 ± 15.8 179.5 ± 12.9 207.4 ± 14.4
 β-Alanine 7.9 ± 1.6a 7.9 ± 1a 10.5 ± 1.1b 9.9 ± 0.6b
 Arginine 229.4 ± 32.1 168.5 ± 16.6 202.3 ± 13.5 206.1 ± 7.1
 Asparagine 21.5 ± 4.5 23.2 ± 4.5 21.1 ± 3.1 19.9 ± 2.2
 Aspartate 1.5 ± 0.4ab 2.6 ± 0.3a 0.8 ± 0.2b 1.6 ± 0.7ab
 Citrulline 172.3 ± 20.4 198.2 ± 23 171.9 ± 28.6 246.8 ± 26.3
 Glutamate 240.4 ± 17.2 236.5 ± 14.6 219.7 ± 14.2 226.6 ± 21.6
 Glutamine 17.6 ± 5.2 21.5 ± 7.1 24.9 ± 3.9 32.5 ± 4.6
 Glycine 384.6 ± 47.6 333 ± 65 322.9 ± 24.1 242.1 ± 22.5
 Histidine 28.4 ± 3.5 28 ± 5 28.9 ± 2.8 32.4 ± 1.8
 Isoleucine 82.9 ± 10.7 65.8 ± 4.3 66.3 ± 5 70.2 ± 7.9
 Leucine 164.9 ± 26.3 164.3 ± 18.9 138.2 ± 13.7 164.1 ± 16.2
 Lysine 115.5 ± 25.4 79 ± 7.1 91.1 ± 11.6 96.8 ± 18.2
 Methionine 27.1 ± 5.5 24.8 ± 3 24.9 ± 2.8 23.1 ± 2.1
 Ornithine 99.5 ± 33.3 102.4 ± 20.3 83.5 ± 12.7 119.2 ± 33.6
 Phenylalanine 51.1 ± 5.8 54.7 ± 4.9 46.2 ± 6.2 48.6 ± 2.3
 Serine 70 ± 8.3 53.3 ± 14.4 54.6 ± 7.5 51.7 ± 5.1
 Taurine 78.5 ± 23.1 86.8 ± 17 68.7 ± 12.2 72.8 ± 7.6
 Threonine 95.3 ± 20.9 110.8 ± 29.2 89.7 ± 16.1 92.1 ± 10.4
 Tryptophan 41.6 ± 6.8 43.6 ± 2.1 41.6 ± 4.3 43.8 ± 2.2
 Tyrosine 66.2 ± 8.6 69.5 ± 5.6 64.1 ± 4.9 69 ± 8.7
 Valine 198.7 ± 30.3 224.8 ± 18.7 185.7 ± 19.3 215.1 ± 23.3
Agmatine and polyamines
 Agmatine 54.2 ± 9.6 53.6 ± 5.8 57.6 ± 2.9 57.54 ± 3.5
 Putrescine 1.5 ± 0.4 1.1 ± 0.2 1.3 ± 0.1 1.3 ± 0.3
 Spermidine 2.5 ± 0.1ab 2.9 ± 0.2a 2.3 ± 0.1b 2.5 ± 0.1ab
 Spermine 4.4 ± 0.4a 6.2 ± 0.7a 2.7 ± 0.1b 3.3 ± 0.1bc
  1. Values represent means ± SEM
  2. Different superscripts within Effect columns are significantly different (P < 0.05)
  3. Only maternal plasma from ewes which were considered pregnant with normally developed conceptuse were utilized for these analyses