Therefore the other aim of our study is to discover SNPs of HCN4 exon 1, including the regulatory sequence and exon-intron boundary of it, which plays an importable role of channel function.
Methods To define the fetus genotypes and gene mutation sites, the PCR and sequencing techniques were applied to amplify and analyze the regions of exon, exon-intron and promoter of TYR gene in probands and their parents of 2 families.
To observe the gene polymorphism of Rh blood group in unrelated radom individuals and families for Chinese Han nationality, polymerase chain reaction sequence specific primer (PCR SSP) was used to amplify the Rh C/E gene, Rh D gene, exons, intron 2 and 10, insert and Rh Box in 160 blood samples of Rh D positive unrelated individuals and 71 samples of Rh D negative unrelated individuals and 7 samples of families whose probands were Rh D negative.
Studies of the statistical characteristics of EID show that there are 103848 genes,478484 introns and 582332 exons,with averagely 4.61 introns and 5.61 exons per gene. Introns with 40~120 nt in length are abundant in the database.
The association between genotypes and ESCC risk was estimated by unconditional multivariate logistic regression analysis, and stepwise regression procedure was used for constructing the final logistic regression model.
G protein subunit gene families are comparatively conservative and primitive, with all of which exon intron junctions conform to the GT AG rule except for one alternative splice site at 5' end of exon 4 in Gnas which uses GT TG junction. In the coding regions, exon intron structures and intron positions among each of the subunit gene families are comparatively conserved.
The exon-intron structure of these genes has been analyzed in zebrafish Danio rerio, loach Misgurnus fossilis, fugu Takifugu rubripes, and Nile puffer Tetraodon fahaka.
This is supported by high sequence similarity between mlc1 and mlc3 as well as by the exon-intron structure of these genes and their localization on different chromosomes.