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Linkage Map of the Short Arm of Human Chromosome 11: Location of the Genes for Catalase, Calcitonin, and Insulin-Like Growth Factor II
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Linkage Map of the Short Arm of Human Chromosome 11: Location of the Genes for Catalase, Calcitonin, and Insulin-Like Growth Factor II
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Linkage Map of the Short Arm of Human Chromosome 11: Location of the Genes for Catalase, Calcitonin, and Insulin-Like Growth Factor II
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Journal Article
Linkage Map of the Short Arm of Human Chromosome 11: Location of the Genes for Catalase, Calcitonin, and Insulin-Like Growth Factor II
1985
Overview
The following order of genes on the short arm of human chromosome 11 (11p) was determined previously: parathyroid hormone (PTH)--the β -globin gene cluster (HBBC)--HRAS1/insulin. Although it is generally agreed that HRAS1 (formerly termed c-Ha-ras-1) and the insulin gene are close to each other [1-4 centimorgans (cM)], their order on chromosome 11p is still in question. We have now added three other genes, those for catalase, calcitonin, and insulin-like growth factor II (IGF-II), to this map of chromosome 11p by use of restriction site polymorphisms adjacent to these genes in classical linkage analysis. Most importantly, we find no evidence of linkage between the catalase and HBBC loci. In addition, our data indicate that the calcitonin gene is located between the catalase gene and the PTH gene. Our best estimate of the distance between the catalase and calcitonin genes is ≈ 16 cM, while that between the calcitonin and PTH genes is ≈ 8 cM. In agreement, very loose linkage was found between the catalase and PTH loci (≈ 26 cM). Since the catalase locus has been mapped to 11p13, these data support the view that the PTH, HBBC, HRAS1, and insulin loci are located on the distal short arm of chromosome 11. The IGF-II gene is tightly linked to both the HRAS1 oncogene and the insulin gene since no recombinants were observed between the IGF-II and the HRAS1/insulin loci. Thus, based on our linkage analysis we propose that the most likely gene order for the short arm of chromosome 11 is centromere--catalase--calcitonin--PTH-- HBBC--HRAS1/insulin--telomere and that the IGF-II gene is very close to both the HRAS1 and the insulin genes.
Publisher
National Academy of Sciences of the United States of America,National Acad Sciences
Subject
Biological and medical sciences
/ Chromosomes, Human, 6-12 and X
/ Classical genetics, quantitative genetics, hybrids
/ DNA
/ Fundamental and applied biological sciences. Psychology
/ Genes
/ Genetics of eukaryotes. Biological and molecular evolution
/ Genomics
/ Human
/ Humans
/ Insulin
