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Background: To test if the hypocretin (orexin) neuropeptide precursor (HCRT) gene, HCRT, mutations are implicated in the development of narcolepsy with cataplexy deficiency in young children. Methods: The entire HCRT gene and ~2000bp promoter region was first sequenced in 181 patients and 153 controls, and rare polymorphisms including three nonsynonymous amino acid changes were identified. Next the...
Based on the observation of a grey phenotype in the F1 generation from a cross between two white plumage duck varieties, the white Kaiya and the white Liancheng, we hypothesized a possible interaction between two autosomal loci that determine grey plumage. Using the parental and F1 individuals, seven testing combinations including five different F1 intercrosses (F2) and two different backcrosses (BC...
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