Table 4.

Standard measureable amino acid concentrations (μm) in fetal plasma at 65 d (0.44 gestation)

Amino acid	Diet		Sex		P
	CP	LP	M	F	D	S	D × S
Alanine	285 ± 14.5	266 ± 14.5	280 ± 14.7	272 ± 14.2	NS	NS	NS
Glycine	397 ± 22.8	479 ± 26.2	454 ± 24.3	426 ± 24.3	0.01	NS	0.03a
Isoleucine	78.9 ± 4.44	76.1 ± 4.11	82.8 ± 4.48	72.5 ± 4.33	NS	NS	NS
Leucine	140 ± 6.06	127 ± 5.93	141 ± 6.06	126 ± 5.96	NS	NS	NS
Valine	212 ± 12.3	199 ± 11.3	216 ± 12.3	196 ± 11.7	NS	NS	NS
Serine	700 ± 49.1	691 ± 48.1	678 ± 47.3	717 ± 50.0	NS	NS	NS
Threonine	448 ± 35.3	463 ± 32.9	498 ± 34.6	417 ± 33.5	NS	NS	NS
Proline	119 ± 5.99	116 ± 5.57	127 ± 5.99	109 ± 5.79	NS	<0.05	NS
Phenylalanine	175 ± 8.97	174 ± 8.75	187 ± 9.14	163 ± 8.99	NS	NS	NS
Tryptophan	87.2 ± 12.7	88.6 ± 12.7	92.0 ± 11.3	84.0 ± 11.0	NS	NS	NS
Tyrosine	277 ± 27.7	231 ± 22.9	269 ± 23.1	241 ± 22.4	NS	NS	NS
Lysine	702 ± 65.1	540 ± 61.8	662 ± 63.9	574 ± 62.8	NS	NS	NS
Asparagine	54.6 ± 2.87	54.1 ± 2.73	59.6 ± 2.77	49.4 ± 2.77	NS	<0.05	NS
Aspartic acid	9.66 ± 0.66	9.16 ± 0.60	10.4 ± 0.66	8.41 ± 0.66	NS	NS	NS
Glutamic acid	218 ± 16.8	224 ± 15.9	233 ± 16.3	209 ± 16.5	NS	NS	NS
Total	3821 ± 179	3580 ± 170	3832 ± 174	3557 ± 174	NS	NS	NS

Data are mean ± sem concentrations (μM) for fetuses of ewes fed a CP diet (n=29: males, n=13; females, n=16) or an LP diet (n=31: males, n=16; females, n=15) to d 65 gestation. Data were analyzed by the general linear mixed model for the fixed effects of diet (D), sex (S), or their interaction (D×S) using Genstat 14. The ewe was included as a random term in the model. NS, nonsignificant. Values of P < 0.05 were considered significant.

^aData illustrating the statistically significant interaction are in the Results section.