Oral glycine loading test to the parents of a patient with congenital hypergly-cinemia revealed that the elevation of glycine was more remarkable and that of serine less remarkable. It is, therefore, suggested that the parents have a minor block in the conversion of glycine to serine and that they are heterozygous for the disorder.
About this Journal The Tohoku Journal of Experimental Medicine (TJEM) was founded in 1920
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