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排序方式: 共有112条查询结果,搜索用时 15 毫秒
2.
A transcribed gene in an intron of the human factor VIII gene 总被引:18,自引:0,他引:18
3.
Maternal duplication associated with gene deletion in sporadic hemophilia. 总被引:13,自引:6,他引:7
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J Gitschier 《American journal of human genetics》1988,43(3):274-279
Sporadic occurrences of X-linked disorders can give insights into mutagenesis in man. In a case of sporadic hemophilia, associated with a partial deletion of the factor VIII gene, an unexpected inheritance pattern of gene rearrangements was observed. The factor VIII gene was found to be partially duplicated in the hemophiliac's mother. A pedigree analysis indicates that the mother has contributed both aberrant genes as well as the normal gene to her offspring. One simple model for the evolution of the deletion in this family is that the duplication is the precursor to the deletion. 相似文献
4.
5.
Haemophilia A: database of nucleotide substitutions, deletions, insertions and rearrangements of the factor VIII gene, second edition. 总被引:2,自引:0,他引:2
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E G Tuddenham R Schwaab J Seehafer D S Millar J Gitschier M Higuchi S Bidichandani J M Connor L W Hoyer A Yoshioka 《Nucleic acids research》1994,22(22):4851-4868
A large number of different mutations in the factor VIII (F8) gene have been identified as a cause of haemophilia A. This compilation lists known single base-pair substitutions, deletions and insertions in the F8 gene and reviews the status of the inversional events which account for a substantial proportion of mutations causing severe haemophilia A. 相似文献
6.
Haemophilia A: database of nucleotide substitutions, deletions, insertions and rearrangements of the factor VIII gene, second edition. 总被引:4,自引:0,他引:4
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![点击此处可从《Nucleic acids research》网站下载免费的PDF全文](/ch/ext_images/free.gif)
E G Tuddenham R Schwaab J Seehafer D S Millar J Gitschier M Higuchi S Bidichandani J M Connor L W Hoyer A Yoshioka 《Nucleic acids research》1994,22(17):3511-3533
A large number of different mutations in the factor VIII (F8) gene have been identified as a cause of haemophilia A. This compilation lists known single base-pair substitutions, deletions and insertions in the F8 gene and reviews the status of the inversional events which account for a substantial proportion of mutations causing severe haemophilia A. 相似文献
7.
8.
Saxitoxin binding to sodium channels in head extracts from wild-type and tetrodotoxin-sensitive strains of Drosophila melanogaster 总被引:1,自引:0,他引:1
Extracts prepared from heads of Drosophila melanogaster show high-affinity binding (KD = 1.9 nM) of [3H]saxitonin, a compound known to bind to and block voltage-sensitive sodium channels in other organisms. The interaction between saxitoxin and the Drosophila saxitoxin receptor is non-cooperative and reversible with a half-life of 18.3 s for binding at 4 degrees C. The saturable binding is specifically inhibited by tetrodotoxin with a K1 = 0.30 nM. The number of saturable binding sites in the extract is 97 fmol/mg protein. Since approx. 50% of the binding activity is recovered in the extract, the number of binding sites in the head is estimated to be 6.4 fmol/mg head. Nerve conduction in Drosophila larvae is completely blocked after 20 min in a bathing solution containing 200 nM tetrodotoxin. A comparison between the binding and the electrophysiological studies in Drosophila and other organisms suggests that the Drosophila saxitoxin receptor is part of the voltage-sensitive sodium channel involved in the propagation of action potentials. A mutant (ttxs), which is abnormally sensitive to dietary tetrodotoxin, is shown to be indistinguishable from wild type with respect to [3H]saxitonin-binding properties and physiological sensitivity to tetrodotoxin. These studies provide techniques which can be used to identify mutants with defects in the saxitoxin-binding component of the sodium channel. 相似文献
9.
B Levinson A E Lehesjoki A de la Chapelle J Gitschier 《American journal of human genetics》1990,46(1):53-62
We have examined the Finnish hemophilia A population for factor VIII gene mutations. This study included 83 unrelated patients and revealed 10 mutations associated with hemophilia. Using cloned cDNA, genomic, and oligonucleotide probes, we have identified three classes of mutations: five mutations causing the loss of TaqI restriction sites, a point mutation resulting in a new TaqI site, and four partial gene deletions. Although exons 5 and 6 were involved in three of the four partial gene deletions, the extent of the DNA lost differs in each case. The fourth deletion was located entirely within intron 1 and segregated with the disease in a large hemophilia pedigree. There was no history of hemophilia in eight of the 10 families. The origin of the mutation was determined in six of these pedigrees, two of which showed evidence for maternal mosaicism. 相似文献
10.
Using a battery of seven lectin-ferritin conjugates as probes for cell surface glycoconjugates, we have studied the pattern of plasmalemmal differentiation of cells in the embryonic rat pancreas from day 15 in utero to the early postpartum stage. Our results indicate that differentiation of plasmalemmal glycoconjugates on acinar, endocrine, and centroacinar cells is temporally correlated with development and is unique for each cell type, as indicated by lectin-ferritin binding. Specifically, (a) expression of adult cell surface saccharide phenotype can be detected on presumptive acinar cells as early as 15 d in utero, as indicated by soybean agglutinin binding, and precedes development of intracellular organelles characteristic of mature acinar cells; (b) maturation of the plasmalemma of acinar cells is reached after intracellular cytodifferentiation is completed, as indicated by appearance of Con A and fucoselectin binding sites only at day 19 of development; conversely, maturation of the endocrine cell plasmalemma is accompanied by "loss" (masking) of ricinus communis II agglutinin receptors; and (c) binding sites for fucose lectins and for soybean agglutinin are absent on endocrine and centroacinar cells at all stages examined. We conclude that acinar, centroacinar, and endocrine cells develop from a common progenitor cell(s) whose plasmalemmal carbohydrate composition resembles most closely that of the adult centroacinar cell. Finally, appearance of acinar lumina beginning at approximately 17 d in utero is accompanied by differenetiation of apical and basolateral plasmalemmal domains of epithelial cells, as indicated by enhanced binding of several lectin-ferritin conjugates to the apical plasmalemmal, a pattern that persists from this stage through adult life. 相似文献