Vitamin B12 and Transmethylation in the Baby Pig.

Abstract

BI2 AND TRANSMETHYLATION 307action of these compounds.Summary. 1. Mast cell counts were made on the cheek pouches of hamsters subjected to total-body X-irradiation. 2. Following irradiation there is a marked increase in the number of atypical mast cells accompanied by a reduction in the total number of mast cells. 3 . Repopulation of the cheek pouch with mast cells is relatively slow, being incomplete even at the end of 33 days.It has been stated by Schaefer et aZ.( 1,2) that vit. B12 is required by the chick and the rat for the synthesis of choline from methionine . Stekol et d ( 3 ) have stated, however, that %it. B12 deficiency had no effect on the extent of transmethylation to choline or creatine". Johnson et al. (4,s) have shown that baby pigs raised on a synthetic milk diet containing adequate vit. B12 and 0.8% methionine require 0.1% choline in the diet and that this choline requirement can be *

Effect of Level of Protein and Supplemental Choline on Reproductive Performance of Gilts Fed Sorghum Diets

“…(Grandhi and Strain, 1981), did not show any improvement in weaning weight due to increased gestation choline levels. Dietary protein and methionine have been shown to spare completely choline for growth (Nesheim et al, 1949;Dyer and Krider, 1950;Firth et al, 1953;Kroening and Pond, 1967;Bryant et al, 1977;Russett et al, 1979b), and the increase in choline from soybean meal in the high protein diet increased dietary choline (865 vs 1,105 mg/kg for the low and high protein diets, respectively). Our data suggest that the choline effect was more evident in gilts fed a 12% protein diet than gilts fed a 16% protein diet, and that the effect was most evident at 42 d postpartum (table 3).…”