Abstract
SUMI, S., ISHIKAWA, T., ITO, Y., OISHI, H., ASAI, K. and WADA, Y. Probable Assignment of the Dihydropteridine Reductase Gene to 4p15.31. Tohoku J. Exp. Med., 1990, 160 (1), 93-94-We report the dihydropteridine reductase (DHPR) activity in cases with interstitial deletion of the short arm of chromosome 4. Case 1 with the segment 4p15.32-4p16 deleted has normal DHPR activity. Case 2 with 4p15.2-4p15.32 deleted has reduced DHPR activity, less than 50% of normal.