单词	valine
释义	valine /ˈveɪliːn / noun [mass noun] Biochemistry An amino acid which is a constituent of most proteins. It is an essential nutrient in the diet of vertebrates. Chemical formula: (CH3)2CHCH(NH2)COOH. In sickle cell disease, the amino acid valine is substituted for glutamic acid in the beta-hemoglobin chain of hemoglobin.... When synthetic lysine is used in the lactation diet, care should be taken to ensure that methionine, valine, and threonine are not limiting. Sickle cell anemia is caused by the replacement of glutamate by valine at the sixth position of the [beta] globin chain. Origin Early 20th century: from val(eric acid) + -ine4.
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