title: A twenty strain survey and backcross localization of the erythrocytic GTP concentration determining locus Gtpc on mouse chromosome 9.
abstract: Erythrocyte nucleotide concentrations were surveyed among 20 inbred strains of mice in order to further assess the variability in GTP concentration. There was no significant difference in erythrocytic ATP concentration (Scheffé's test at P = 0.01), 678-1154 nmol/mL packed cells, among the strains surveyed. Two groups were distinguishable with respect to erythrocytic GTP concentration, 8 strains having high GTP, 215 +/- 44 nmole/mL packed cells, and 12 strains having low GTP, 34 +/- 12 nmole/mL packed cells. The erythrocytic GTP concentration determining trait Gtpc was previously shown to be linked to transferrin, Trf, on chromosome 9. Analysis of 232 [(B6 x WB) F1 x B6] backcross individuals for Gtpc and 8 microsatellite markers restricted the localization of Gtpc to a 5.6 +/- 2.1 cM region. The gene order and genetic distances in cM +/- SE are: (D9Mit14) 0.4 +/- 0.4 (D9Mit24) 1.7 +/- 0.8 (Gtpc, D9Mit51, D9Mit116, D9Mit212) 3.9 +/- 1.3 (D9Mit200) 3.0 +/- 1.1 (D9Mit20) 7.8 +/- 1.8 (D9Mit18). The GTP concentration determining trait appears to be a property of erythrocytes as no differences were observed for GTP/ATP ratios of brain, kidney, liver, and tongue from a low GTP strain, C3H/HeHa x Pgk-la and a high GTP strain, C57BL/6J.
authors.affiliation: Department of Medical Genetics, Faculty of Medicine, University of Calgary, Canada.
authors.forename: G J
authors.initials: GJ
authors.lastname: Wiebe
authors.forename: E
authors.initials: E
authors.lastname: Fung
authors.forename: F G
authors.initials: FG
authors.lastname: Biddle
authors.forename: F F
authors.initials: FF
authors.lastname: Snyder
mesh_terms: D000255:Adenosine Triphosphate / Q000097:blood / Q000378:metabolism; D000818:Animals; D001921:Brain / Q000378:metabolism; D002874:Chromosome Mapping; D003433:Crosses, Genetic; D004912:Erythrocytes / Q000378:metabolism*; D005819:Genetic Markers; D006160:Guanosine Triphosphate / Q000097:blood* / Q000378:metabolism; D007668:Kidney / Q000378:metabolism; D008099:Liver / Q000378:metabolism; D051379:Mice; D008809:Mice, Inbred C3H; D008810:Mice, Inbred C57BL; D016688:Mice, Inbred NOD; D008815:Mice, Inbred Strains / Q000097:blood / Q000235:genetics*; D018895:Microsatellite Repeats; D009115:Muridae / Q000097:blood / Q000235:genetics; D013045:Species Specificity; D014059:Tongue / Q000378:metabolism
chemical_list: D005819:Genetic Markers; D006160:Guanosine Triphosphate; D000255:Adenosine Triphosphate