Analysis of the D1S80 (pMCT118) VNTR locus polymorphism in a native Kuwaiti population by the polymerase chain reaction.

We have determined the allele and genotype frequencies at the hypervariable locus D1S80 in a native Kuwaiti population using the polymerase chain reaction technique and subsequent high resolution gel electrophoresis. In a sample of 200 individuals, 21 alleles and 57 genotypes were detected. The alleles with 18 and 24 repeat units were most common with frequencies of 0.

Sporadic occurrence of nondeletion Prader-Willi syndrome in two cases: a female with maternal uniparental disomy and a male with complex chromosomal rearrangement.

We report here two cases of nondeletion Prader-Willi syndrome (PWS). Case 1 is a 9-yr-old female patient with classical features of the syndrome and cytogenetically normal chromosome 15. DNA analysis using polymorphic probes for Prader-Willi Critical Region (PWCR) showed absence of paternal alleles while maternal uniparental isodisomy (UPisoD) was confirmed.

HLA-DQ alpha allele and genotype frequencies in a native Kuwaiti population.

We report the allele and genotype frequencies in a sample of an unrelated native Kuwaiti population determined by the use of polymerase chain reaction (PCR) and reverse dot-blot analysis. This technique, involving the use of commercially available AmpliType HLA-DQ alpha forensic DNA amplification and typing kit, has permitted the definition of six alleles and 21 genotypes in a sample of 220 people. The allelic frequencies are in the range 5.

Chemical modification of rat liver cytosolic NADP(+)-linked isocitrate dehydrogenase by N-ethylmaleimide. Evidence for essential sulphydryl groups.

Incubation of rat liver cytosolic isocitrate dehydrogenase with N-ethylmaleimide (NEM) resulted in the inactivation of the enzyme following pseudo-first order kinetics. Isocitrate affords considerable protection against inactivation whereas NADP+ enhances modification of the enzyme, suggesting localization of the modified group at the active site. Correlation of loss of activity with incorporation of [14C]NEM indicated that two sulphydryl residues/sub-unit are modified of which only one is shown to be involved in catalysis.

Purification and partial characterisation of NADP(+)-linked isocitrate dehydrogenase from rat liver cytosol.

NADP(+)-linked isocitrate dehydrogenase from rat liver cytosol was purified (approximately 135-fold) to apparent homogeneity in 27% yield. The purified enzyme has specific activity of 73 units.mg-1.