. Biochemistry of plants and animals, an introduction. Biochemistry. NHOCCH2CH2 CH. CH3 H CH2CH2CONH2 vitamin B^2 meats and especially liver are the only important dietary sources. Human requirements are estimated to be only in the neighborhood of a microgram daily. Although the function of this factor has been exceptionally difficult to outline, vitamin B12 is believed to participate in the formation of methyl groups. Apparently it is not essential to methyl transfer. Whether methyl synthesis is concerned or not, the vitamin is required for the production of red blood cells. Pernicious anemia
. Biochemistry of plants and animals, an introduction. Biochemistry. NHOCCH2CH2 CH. CH3 H CH2CH2CONH2 vitamin B^2 meats and especially liver are the only important dietary sources. Human requirements are estimated to be only in the neighborhood of a microgram daily. Although the function of this factor has been exceptionally difficult to outline, vitamin B12 is believed to participate in the formation of methyl groups. Apparently it is not essential to methyl transfer. Whether methyl synthesis is concerned or not, the vitamin is required for the production of red blood cells. Pernicious anemia is not strictly a dietary disease, but in human beings and animals eating normally is due to improper absorption of vitamin B^o. This rather common and serious abnormality thus is a deficiency state but occurs only when the gastric juice is devoid of a second factor. The missing component normally forms a complex with the vitamin, permitting its absorption through the intestine. Many isolation studies have failed so far in isolating and characterizing a single material serving in the absorption of B^^- Apparently the factor is present in very small amounts and may actually be more than one substance. Injection of the vitamin by-passes the problem of intestinal absorp- tion and cures the deficiency symptoms. Anemia is the most common. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Mallette, M. Frank (Manney Frank), 1917-. New York, Wiley
Size: 2020px × 1237px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookpublishernewyorkwiley, booksubjectbiochemis
