Chromosomes

To generate the novel rice lines/varieties with high-yielding and low chalkiness ratio for the improvement of chalkiness traits of rice grains on the high-yielding rice varieties with the help of Microsatellitemolecular markers linked with the genes that control chalkiness characteristics on chromosome 7 of rice.

27p trinhthamhodang7 31-08-2020 18 1   Download

The development of fruits without fertilization is known as parthenocarpy. Parthenocarpy improves the fruit quality, processing attributes, production and productivity of vegetable crops like tomato, cucumber, watermelon etc. Absence of seeds can enhances the shelf life of the fruits, allowing a better conservation, fruit set in adverse climatic conditions, early and offseason production of vegetable crops. Therefore, it is important to ensure yield stability regardless of environmental conditions.

20p gaocaolon5 14-06-2020 16 3   Download

Head and neck squamous cell carcinoma (HNSCC) is the most common and most aggressive type of head and neck cancer. Current approaches for the treatment of HNSCC are not sufficient to increase the patient survival or to reduce the high recurrence rate.

12p nutifooddau 27-01-2019 25 2   Download

Bài giảng chuyên đề "Bệnh lý di truyền" cung cấp cho người học các kiến thức: Các khái niệm cơ bản, nguyên nhân và bệnh sinh của các bệnh lý di truyền, cơ chế bệnh sinh của những biến đổi di truyền của gen, cơ chế bệnh sinh các bệnh lý di truyền do biến dị Chromosome, nguyên tắc dự phòng và điều trị các bệnh lý di truyền. Mời các bạn cùng tham khảo nội dung chi tiết.

15p nhansinhaomong_02 04-10-2015 101 6   Download

Đề tài: Chromosome (Nhiễm sắc thể) trình bày các nội dung về lịch sử phát hiện; các sinh vật nhân sơ; trong sinh vật nhân chuẩn; số lượng nhiễm sắc thể trong các sinh vật khác nhau; kiểu nhân; sự sai lệch; liên kết ngoài.

27p conchimnon32 26-06-2014 130 15   Download

Tế bào là đơn vị tổ chức cơ bản của cơ thể sống. Trong tế bào có chứa các bào quan và nhân. Nhân tế bào là cấu thành bắt buộc của tế bào eukaryote, vì trong nhân có chứa nhiễm sắc thể (NST), là cấu trúc mang vật chất di truyền ADN (acid deoxyribonucleotide) của tế bào và cơ thể. Nhiễm sắc thể đƣợc quan sát đầu tiên bởi Nageli năm 1842, nhƣng đến năm 1888, NST mới đƣợc Waldeyer đặt tên là “chromosome” (“chromo” có nghĩa bắt màu nhuộm và “some” nghĩa là một thể) (Eldridge, 1985). Nhiễm...

52p canhchuon_1 19-06-2013 132 14   Download

We report here the full coding sequence of a novel mouse putative membrane-associated mucin containing three extracellular EGF-like motifs and a mucin-like domain consisting of at least 20 tandem repeats of 124–126 amino acids. Screening a cosmid and a BAC libraries allowed to isolate several genomic clones. Genomic and cDNA sequence comparisons showed that the gene consists of 25 exons and 24 introns covering a genomic region of  52 kb. The first intron is  16 kb in length and is followed by an unusually large exon ( 9.5 kb) encoding Ser/Thr-rich tandemly repeated sequences....

10p system191 01-06-2013 44 4   Download

The siglecs (sialic acid-binding Ig-like lectins) are a distinct subset of the Ig superfamily with adhesion-molecule-like structure. We describe here a novel member of the siglec protein family that shares a similar structure including five Ig-like domains, a transmembrane domain, and a cytoplasmic tail containing two ITIM-signaling motifs. Siglec10 was identified through database mining of an asthmatic eosinophil EST library. Using the Stanford G3 radiation hybrid panel we were able to localize the genomic sequence of siglec-10 within the cluster of genes on chromosome 19q13.

14p system191 01-06-2013 43 6   Download

Telomerase is a specialized reverse transcriptase responsible for synthesizing telomeric DNA at the ends of chromosomes. Six subunits composing the telomerase complex have been cloned: hTR (human telomerase RNA), TEP1 (telomerase-associated protein 1), hTERT (human telomerase reverse transcriptase), hsp90 (heat shock protein 90), p23, and dyskerin. In this study, we investigated the role of each the telomerase subunit on the activity of telomerase.

9p research12 01-06-2013 28 3   Download

The centromere–kinetochore complex is a highly specialized chromatin domain that both mediates and monitors chromosome–spindle interactions responsible for accurate partitioning of sister chromatids to daughter cells. Centromeres are distinguished from adjacent chromatin by specific patterns of histone modification and the presence of a centromere-specific histone H3 variant (e.g. CENP-A). Centromere-proximal regions usually correspond to sites of avid and persistent sister chromatid cohesion mediated by the conserved cohesin complex.

15p research12 01-06-2013 49 4   Download

Mammalian alcohol dehydrogenases (ADH) 3 form a com-plex enzyme system based on amino-acid sequence, func-tional properties, and gene expression pattern. At least four mouseAdhgenes are known to encode di€erent enzyme classes that share less than 60% amino-acid sequence iden-tity. Two ADH-containing and overlapping C57BL/6 bacterial arti®cial chromosome clones, RP23-393J8 and -463H24, were identi®ed in a library screen, physically mapped, and sequenced.

9p research12 29-04-2013 22 2   Download

The complete coding sequence of a BDIX rat gene homo-logous to the human ABO gene was determined. Identifi-cation of the exon–intron boundaries, obtained by comparison of the coding sequence with rat genomic sequences from data banks, revealed that the rat gene structure is identical to that of the human ABO gene. It localizes to rat chromosome 3 (q11-q12), a region homolo-gous to human 9q34.

8p research12 23-04-2013 39 2   Download

BLASTanalysis of the human and mouse genome sequence databases using the sequence of the human CMP-sialic acid:b-galactoside a-2,6-sialyltransferase cDNA (hST6Gal I, EC2.4.99.1) as a probe allowed us to identify a putative sialyltransferase gene on chromosome 2. The sequence of the corresponding cDNA was also found as an expressed sequence tag of human brain.

12p tumor12 20-04-2013 28 2   Download

Short strands of tandem hexameric repeats known as telomeres cap the ends of linear chromosomes.These repeats protect chromosomes from degradation and prevent chro-mosomal end-joining, a phenomenon that could occur due to the end-replicationproblem.Telomeres aremaintainedby the activity of the enzyme telomerase.The total number of telomeric repeats at the terminal end of a chromosome determines the telomere length, which in addition to its importance in chromosomal stabilization is a useful indica-tor of telomerase activity in normal and malignant tissues....

15p tumor12 20-04-2013 34 3   Download

The physiological role of a bifunctional enzyme, 3,4-dihydrocoumarin hydrolase (DCH), which is capable of both hydrolysis of ester bonds and organic acid-assisted bromination of organic compounds, was investigated. Purified DCH fromAcinetobacter calcoaceticusF46 cata-lysed dose- and time-dependent degradation of peracetic acid. The gene (dch) was cloned from the chromosomal DNA of the bacterium.

9p tumor12 20-04-2013 37 3   Download

There are at least two membrane-bound (HynSL and HupSL) and one soluble (HoxEFUYH) [NiFe]hydrogen-ases in Thiocapsa roseopersicinaBBS, a purple sulfur photosynthetic bacterium. Genes coding for accessory pro-teins that participate in the biosynthesis and maturation of hydrogenases seem to be scattered along the chromosome. Transposon-based mutagenesis was used to locate the hydrogenase accessory genes.

10p fptmusic 16-04-2013 33 3   Download

We have isolated a cDNA that encodes a novel serine protease, prosemin, from human brain. The cDNA of human prosemin is 1306 bp, encoding 317 amino acids. It showed significant homology with the sequence of a chromosome 16 cosmid clone (accession no. NT_037887.4). The prosemin gene contains six exons and five introns. The amino acid sequence of prose-min shows significant homology to prostasin,c-tryptase, and testisin (43%, 41%, and 38% identity, respectively), the genes of which are also located on chromosome 16. ...

13p fptmusic 12-04-2013 30 4   Download

Rio1 is the founding member of the RIO family of atypical serine kinases that are universally present in all organisms from archaea to mammals. Activity of Rio1 was shown to be absolutely essential inSaccharomyces cerevisiaefor the processing of 18S ribosomal RNA, as well as for proper cell cycle progression and chromosome maintenance. We determined high-resolution crystal structures ofArchaeoglobus fulgidusRio1 in the presence and absence of bound nucleotides.

16p fptmusic 11-04-2013 30 2   Download

Analysis of a draft nuclear genome sequence of the diatomThalassiosira pseudonana revealed the presence of 11 open reading frames showing significant similarity to functionally characterized fatty acid front-end desaturases. The corresponding genes occupy discrete chromosomal loca-tions as determined by comparison with the recently published genome sequence. Phylogenetic analysis showed that two of the T. pseudonana desaturase (Tpdes) sequences grouped with proteobacterial desaturases that lack a fused cytochrome b5 domain. ...

12p fptmusic 11-04-2013 32 2   Download

Eukaryotic genomes are composed of isochores, i.e. long sequences relat-ively homogeneous in GC content. In this paper, the isochore structure of Arabidopsis thalianagenome has been studied using a windowless technique based on theZcurve method and intuitive curves are drawn for all the five chromosomes. Using these curves, we can calculate the GC content at any resolution, even at the base level.

9p fptmusic 11-04-2013 40 3   Download