β-酪蛋白是牛乳蛋白的主要成分,其中以A1、A2 β-酪蛋白最为常见。β-酪蛋白衍生肽具有生物活性,可影响胃肠道和肠脑轴功能。A1和A2 β-酪蛋白具有不同的生理效应,其中A1 β-酪蛋白衍生肽可能加重肠道功能障碍和胃肠道炎症、干扰氧化还原平衡,并可能导致神经炎症和认知功能障碍。临床试验表明,与饮用含A1和A2 β...
In a population of 113 A1A2 Holstein-Friesian cows, using the ELISA method, it was found that variant A2 was present at low content in milk (mean 6.31卤3.09 ng/mL), but variant A1 reached almost seven times higher concentration (43.40 ng/mL卤15.68 ng/mL). This un...
cows of a similar age (first lactation) milked in the same season and found that the BTN7 content in milk samples hydrolyzed by digestive enzymes in vitro was significantly different in milk from cows of the opposite homozygotes (A1A1 vs. A2A2) as well as between A1A2 and A2A2 cows. ...
This finding raises the possibility that sea cows (and perhaps other aquatic mammals inhabiting turbid, red-shifted water such as river dolphins) might use A2-based visual pigments. The presence of cyp27c1 orthologs in terrestrial mammals is more puzzling, but the enrichment of both CYP27C1 ...
Milk is divided into two group's type A1 and type A2 on the basis of betacasomorphin-7 (BCM-7) production. Type A1 milk on enzymatic digestion produces BCM-7 but A2 does not. This is because of mutation that changed proline to histidine at position number 67 in β-casein of type A1...
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of active compound. Formulations according to the invention for use in the field of veterinary medicine contain amounts of active compound which are appropriately matched to the body weight and the metabolism of the animal. For administration to dairy cows, for example, formulations in unit doses...
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Feces composition and manure derived methane yield from dairy cows: Influence of diet with focus on fat supplement and roughage type Henrik Bjarne Møller, Verónica Moset, Maike Brask, Martin Riis Weisbjerg, Peter Lund Pages 36-43 Article preview select article Exposure to PM2.5 in modern offic...
[186] calculated that A2A2 cows produce a higher profit for milk than A1A2 or A1A1 cows. 9. Conclusions Summing up, although the hypothesis on the influence of the β-casein A1 variant on human health was expressed almost 20 years ago, it still lacks conclusive evidence for its ...