PMID- 9533015 OWN - NLM STAT- MEDLINE DCOM- 19980422 LR - 20180214 IS - 0301-0171 (Print) IS - 0301-0171 (Linking) VI - 79 IP - 1-2 DP - 1997 TI - Construction of two near-kilobase resolution restriction maps of the 5' regulatory region of the human apolipoprotein B gene by quantitative DNA fiber mapping (QDFM). PG - 64-70 AB - Quantitative DNA fiber mapping (QDFM) is a high-resolution technique for physical mapping of DNA. The method is based on hybridization of fluorescently labeled DNA probes to individual DNA molecules stretched on a chemically modified glass surface. We now demonstrate and validate a rapid QDFM-based approach for the mapping of multiple restriction sites and precise localization of restriction fragments in large genomic clones. Restriction fragments of a 70-kb P1 clone (P1-70) containing the 5' region of the human apolipo-protein B gene (APOB) were subcloned and mapped along straightened P1-70 DNA molecules. Multicolor fluorescence in situ hybridization (FISH) and digital image analysis allowed us to rapidly position 29 restriction fragments, ranging in size from 0.5 kb to 8 kb, and to map 43 restriction sites. The restriction map obtained by QDFM was in excellent agreement with information obtained by RecA-assisted restriction endonuclease (RARE) cleavage, long-range PCR, and DNA sequence analyses of the P1-70 clone. These data demonstrate that QDFM is a rapid, reliable method for detailed restriction site-mapping of large DNA clones. FAU - Duell, T AU - Duell T AD - Life Sciences Division, Lawrence Berkeley National Laboratory, CA 94720, USA. FAU - Nielsen, L B AU - Nielsen LB FAU - Jones, A AU - Jones A FAU - Young, S G AU - Young SG FAU - Weier, H U AU - Weier HU LA - eng GR - HL47660/HL/NHLBI NIH HHS/United States PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, Non-P.H.S. PT - Research Support, U.S. Gov't, P.H.S. PL - Switzerland TA - Cytogenet Cell Genet JT - Cytogenetics and cell genetics JID - 0367735 RN - 0 (Apolipoproteins B) RN - 0 (Oligonucleotide Probes) RN - EC 2.7.7.- (Rec A Recombinases) RN - EC 3.1.21.- (Deoxyribonuclease EcoRI) RN - EC 3.1.21.- (Deoxyribonuclease HindIII) SB - IM MH - Apolipoproteins B/*genetics MH - Chromosomes, Artificial, Yeast MH - Deoxyribonuclease EcoRI MH - Deoxyribonuclease HindIII MH - Electrophoresis MH - Humans MH - In Situ Hybridization, Fluorescence MH - Oligonucleotide Probes MH - Polymerase Chain Reaction MH - Rec A Recombinases MH - Regulatory Sequences, Nucleic Acid/*genetics MH - Restriction Mapping/*methods MH - Sequence Analysis, DNA EDAT- 1997/01/01 00:00 MHDA- 1998/04/09 00:01 CRDT- 1997/01/01 00:00 PHST- 1997/01/01 00:00 [pubmed] PHST- 1998/04/09 00:01 [medline] PHST- 1997/01/01 00:00 [entrez] AID - 10.1159/000134685 [doi] PST - ppublish SO - Cytogenet Cell Genet. 1997;79(1-2):64-70. doi: 10.1159/000134685.