Premium
Resolution of apolipoprotein B repeat unit position variants on agarose, denaturing, and native polyacrylamide gels
Author(s) -
Prinz Mechthild,
Schmitt Cornelia,
Staak Michael,
Baum Howard
Publication year - 1996
Publication title -
electrophoresis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.666
H-Index - 158
eISSN - 1522-2683
pISSN - 0173-0835
DOI - 10.1002/elps.1150170703
Subject(s) - agarose , allele , locus (genetics) , polyacrylamide gel electrophoresis , biology , polyacrylamide , genetics , microbiology and biotechnology , electrophoresis , microsatellite , gel electrophoresis , tandem repeat , agarose gel electrophoresis , dna , gene , biochemistry , genome , enzyme
Utilizing three different electrophoresis systems for the separation of variable number of tandem repeats (VNTR) alleles of the high variable region 3′ from the apolipoprotein B (Apo B) locus, it could be shown that apparent allele subtypes on native polyacrylamide gels comigrated with the regular ladder alleles on agarose and denaturing polyacrylamide gels. Two subtypes, one with a shift towards the cathode and one shifted towards the anode, and the corresponding ladder alleles were sequenced in order to determine the molecular basis for this aberrant electrophoretical mobility. Subtype and ladder alleles displayed the same number of repeat units but differed in the number and order of different types of repeats. Depending on the variation in the region of pure AT repeat units, the potential secondary structures of hairpin loop formation differed for subtypes and ladder alleles, which is thought to explain the shift in electrophoretic mobility on native polyacrylamide gel electrophoresis.