Chromatin can be analysed by assaying its sensitivity to DNase I or other nucleases in purified nuclei. Usually, this is performed by Southern analysis of genomic DNA extracted from nuclease-treated nuclei, a methodology that requires many cells. Applying restriction fragment length polymorphisms (RFLPs), this methodology has been used for parental allele-specific chromatin studies on imprinted...

The aim of this study was to subtype Listeria monocytogenes strains present in an avocado processing facility using polymerase chain reaction (PCR)-restriction fragment length polymorphism (RFLPs) and pulsed-field gel electrophoresis (PFGE). The inlA gene of the L. monocytogenes isolates was PCR amplified and cut with the restriction endonuclease AluI or Tsp509I. Initial investigation of 64 L. ...

This paper outlines a PCR-based approach for population genetics that offers several advantages over conventional Southern blotting methods for revealing restriction-fragment-length polymorphisms (RFLPs) in nuclear DNA. Primers are constructed from clones isolated from a nuclear DNA library, and these primers subsequently are employed in in vitro syntheses of homologous regions. Amplified produ...

SOURCE/DESCRIPTION; A 4.5 kb (pMCT96.1) or a 3.7 kb (pMCT96.2) of Mspl fragment from cosmid MCT96 isolated by an oligonucleotide (GTGTGTGTGTGTGTGTGTGT) (1) was subcloned into the Accl site of pUC18. POLYMORPHISM: pMCT96.1 : Rsal identifies 3 systems of site polymorphisms; system 1: 4.7 kb (Rl) or 3.7 kb (R2); system 2: 3.0 (R3) kb or 2.8 kb (R4); system 3: 1.0 kb (R5) or 0.9 kb (R6) pMCT96.2 : ...

The agouti (a) coat color locus of the mouse acts within the microenvironment of the hair follicle to control the relative amount and distribution of yellow and black pigment in the coat hairs. Over 18 different mutations with complex dominance relationships have been described at this locus. The lethal yellow (Ay) mutation is the top dominant of this series and is uniquely associated with an e...

We have reinvestigated a classification of clinical heterogeneity among cystic fibrosis (CF) patients that we previously reported and investigated the possible relationship of the identified CF subgroups to haplotypes around the CF gene and to HLA-DR haplotypes. Age-corrected values for sweat electrolytes, rate of progression of lung disease as assessed by Brasfield chest x-ray scores, and seve...

In the United States the most common cystic fibrosis (CF) alleles known are F508, G551D, G542X, R553X, and N1303K. These mutations comprise approximately 85% of U.S. CF alleles, and their detection along with analysis of XV-2C and KM-19 restriction fragment length polymorphisms (RFLPs) can enable the determination of CF status. To facilitate studies for determining CF carrier status, we develop...