GM TYPING BY IMMUNOGLOBULIN HEAVY-CHAIN GENE RFLP ANALYSIS

  • 1 August 1988
    • journal article
    • research article
    • Vol. 43  (2) , 175-181
Abstract
This study was undertaken to investigate a means of assigning Gm allotypes to Caucasians by RFLP analysis. A single immunoglobulin heavy-chain gamma-4 cDNA probe (HU.gamma.4) was hybridized with genomic DNA digested separately with two restriction enzymes, TaqI and PvuII. Results showed excellent correlation (P < .001) between serologically defined Gm allotypes G1m(1), G1m(2), G2m(23), and G1m;G3m (3;5,10) and RFLPs identified with the (HU.gamma.4) probe. We conclude that it is now possible to define common Gm haplotypes in Caucasians by RFLP analysis. This method provides a useful adjunct to serological allotyping and indeed has several important advantages over traditional serology: it allows confident Gm assignment and the definition of homozygous and heterozygous Gm arrangements, is highly reproducible, and is readily executed in any molecular genetic laboratory.