Cleavage of pBR322 DNA I by the restriction endonuclease HinfI is preferentially inhibited at specific HinfI cleavage sites. These sites in pBR322 DNA I have been identified and ordered with respect to the frequency with which they are cleaved. The HinfI site most resistant to cleavage in pBR322 DNA I is unique in that runs of G-C base pairs are immediately adjacent on both sites. Two different...

It has been known for > 10 years that there are two alleles of the human ornithine decarboxylase (ODC) gene, defined by a polymorphic PstI RFLP in intron 1. We have sequenced a large portion of each of the two alleles, including some of the 5' promoter region, exon 1, intron 1, and exon 2, and determined that a single nucleotide polymorphism at base +317 (relative to transcription start site) i...

Type 2 diabetes mellitus (T2DM) is characterized by three major metabolic abnormalities: impaired insulin-stimulated glucose uptake in muscle and adipose tissues, alterations in glucose-stimulated insulin secretion, and increased hepatic glucose production. Both genetic and environmental factors contribute to its development. The insulin gene (INS), insulin receptor gene (INSR), and insulin rec...

The number of rRNA genes in Streptomyces lividans was examined by Southern hybridization. Randomly labeled 23 and 16S rRNAs were hybridized with BamHI, BglII, PstI, SalI, or XhoI digests of S. lividans TK21 DNA. BamHi, BglII, SalI and XhoI digests yielded six radioactive bands each for the 23 and 16S rRNAs, whereas PstI digests gave one band for the 23S rRNA and one high-intensity band and six ...

Cytochrome P450 2E1 and GSTM1 play major roles in metabolic activation and detoxification of many carcinogens and polymorphisms in the encoding genes have been reported to be individually associated with increased susceptibility to certain cancer. In the present study, we investigated the RsaI, PstI and DraI polymorphisms of the CYP2E1 gene and the null GSTM1 genotype in a Thai population. DNA ...

Mutagenesis by the human bladder carcinogen 4-aminobiphenyl (ABP) was studied in single-stranded DNA from a bacteriophage M13 cloning vector. In comparison to ABP lesions in double-stranded DNA, lesions in single-stranded DNA were approximately 70-fold more mutagenic and 50-fold more genotoxic. Sequencing analysis of ABP-induced mutations in the lacZ gene revealed exclusively base-pair substitu...

EcoRI polymorphism within the GLI gene (chromosome 12q13.3-14.1) Source/Description: pKK36Pl contains a 1.55 kb PstI genomic fragment of GLJ cloned into the PstI site of pGEM-3 (1). Polymorphism: EcoRI identifies a two allele polymorphism (Al: 18 kb; A2: 5 kb). Frequency: Estimated from 91 individuals. Al 18 kb (0.72) A2 5kb (0 28) Chromosomal Localisation: Assigned to chromosome 12ql3.3-14.1 u...

Total DNA isolated from Rhizobium leguminosarum VF39SM cells is resistant to cleavage by the restriction endonuclease PstI. Plasmid curing and transfer studies localized this phenotype to pRleVF39b, the second smallest of six plasmids found in this bacterium. In vitro selection for vector modi®cation was employed to isolate a presumptive methylase gene (M.Rle39BI) from a plasmid gene library. T...