Fernandes-Costa F, Metz J
Am J Clin Nutr. 1982 Jan;35(1):83-6. doi: 10.1093/ajcn/35.1.83.
Serum transcobalamins (TC) have been measured in 82 white and 79 Black healthy adults, 170 white and 73 Black pregnant subjects and in cord blood samples from 33 whites and 13 Blacks. Healthy Black adults had significantly higher mean TC I, TC II, and TC III levels than white adults of the same sex. These differences in mean TC levels persisted at all stages of pregnancy. Mean cord blood levels of TC II and TC III were significantly higher in Blacks than in whites. No environmental factors could be identified to account for these differences, which are probably genetically determined.
对82名白人健康成年人、79名黑人健康成年人、170名白人孕妇、73名黑人孕妇以及33名白人、13名黑人的脐带血样本进行了血清转钴胺素（TC）检测。健康的黑人成年人中，同性别的黑人成年人其血清转钴胺素I、转钴胺素II和转钴胺素III的平均水平显著高于白人成年人。孕期各阶段，转钴胺素平均水平的这些差异均持续存在。黑人脐带血中转钴胺素II和转钴胺素III的平均水平显著高于白人。尚未发现环境因素可解释这些差异，这些差异可能由基因决定。
