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Article |

Histidinemia in a Negro Child

Murray Kappelman, MD; George H. Thomas, PhD; R. Rodney Howell, MD
Am J Dis Child. 1971;122(3):212-214. doi:10.1001/archpedi.1971.02110030068005.
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Histidinemia was detected in a Negro girl through a multiple screening process which selected out families having more than one child with learning disorders. Studies of 18 randomly selected asymptomatic Negro children failed to demonstrate a significant racial variation in blood histidine levels; the mean for the group studied was 0.92 mg/100 ml compared to a range of 0.49 to 1.66 mg/100 ml previously recorded among populations of mixed racial origin.

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