Wyniki wyszukiwania - Biblioteka Nauki

1

Expression of telomerase genes as potential marker of neoplastic changes

100%

Mazurek U. , Witek A. , Paul M. , Olejek A. , Wilczok T.

Folia Histochemica et Cytobiologica. Supplement

|

2001

|

tom 39

|

nr 1

2

Organization of the Drosophila genome

100%

Jullien N. , Henaut A. , Miassod R.

Cellular and Molecular Biology Letters

|

1999

|

tom 04

|

nr 4

EN

The distribution of (A,T)-rich regions has been investigated on a 835kb DNA fragment (D835), from the Drosophila X sex chromosome, unsequenced but provided with detailed physical maps for restriction enzymes-recognizing (A,T)- or (C,G)- or (mixte)-motifs, and on several sequenced DNA fragments, 100-600 kb long, from the autosomal chromosomes. Numerous (A,T)-rich regions are present in all DNA fragments. Their size varies from 0.2 kb to several kb in all cases, except for D835 where some of them extend to 20-30 kb. The relationship between these (A,T)-rich regions and several chromosome landmarks has been examined in the particular case of D835. Topo II in-vitro sites are randomly distributed with regard to (A,T)-richness. However, transcription units and repeated regions are significantly localized outside (A,T)-rich regions. On the opposite, SARs and ARSs are mostly localized within (A,T)-rich regions. Lastly, topo II in-vivo sites are almost exclusively localized in (A,T)-rich regions. Speculations are proposed on why and how (A,T)-rich regions may have appeared during the emergence of Drosophila genome from a primitive genome.

3

Construction of the genetic map of rye chromosomes using isozymes-encoding loci

100%

Milczarski P. , Myskow B. , Masojc P.

Journal of Applied Genetics

|

1996

|

tom 37A

4

Caffeine-induced premature chromosome condesation [PCC] in the root meristem cells of Vicia faba

88%

Maszewski J. , Rybaczek D.

Cellular and Molecular Biology Letters

|

2002

|

tom 07

|

nr Suppl.

5

Localisation of GAA microsatellites on barley chromosomes by direct cycling-PRINS [C-PRINS]

88%

Kubalakova M. , Cihalikova J. , Dolezel J.

Prace Naukowe Uniwersytetu Śląskiego w Katowicach

|

1998

|

tom 1696

6

A note on a mosaic bull with XY-XYY sex chromosomes

88%

Jaszczak K. , Parada R. , Jaszczak J.

Animal Science Papers and Reports

|

2002

|

tom 20

|

nr 3

7

Supernumerary marker chromosomes characterized by fluorescence in situ hybridization [FISH]

88%

Bocian E. , Stankiewicz P. , Stanczak H. , Obersztyn E. , Korniszewski L. , Mazurczak T.

Journal of Applied Genetics

|

1996

|

tom 37

|

nr 3

EN

Until recently marker chromosomes have presented a difficult diagnostic problem for cytogeneticists as well as for clinicians. Introduction of FISH to cytogenetic analysis has enabled identification of their origin giving possibility to outline specific phenotypic effects of defined marker chromosomes. Nine marker chromosomes were analysed with FISH using centromeric probes, chromosome- specific libraries and unique DNA sequences probes for PWS/AS critical region. The origin from acrocentric chromosomes was established in 6 cases. One marker was a product of maternal 11;22 translocation and two others were pericentromeric regions of chromosome 2 and 4. Among 6 markers, derived from acrocentric chromosomes, 2 consisted of pericentromeric part of chromosome 15, one was identified as mar (21) and in 3 other cases the origin could not be differentiated between chromosomes 13 and 21 or 14 and 22. Clinical consequences of marker chromosomes including the risk for chromosomal nondisjunction and trisomy 21 as well as the risk for uniparental disomy (UPD) are discussed.

8

Distribution of apolipoprotein E4 isoform in Alzheimer's disease in Poland

88%

Bratosiewicz-Zapart J. , Kloszewska I. , Sobow T. , Liberski P. P.

Archivum Immunologiae et Therapiae Experimentalis

|

1997

|

tom 45

|

nr 2-3

9

Separation of megabased-sized DNA molecules of Aspergillus niger using pulsed field gel electrophoresis

88%

Coral G. , Colak O. , Unaldi M. N.

Folia Biologica

|

2002

|

tom 50

|

nr 1-2

10

Chromosome pairing in tetraploid rye with monosomic-substitution wheat chromosomes

88%

Apolinarska B.

Journal of Applied Genetics

|

2003

|

tom 44

|

nr 2

11

Differences between C57BL-6 and C57BL-10 inbred mouse strains in chromosomes 2,4,13,17 and 18

88%

Gajewska M. , Rutkowski R. , Lukasiewicz D. , Wirth-Dzieciolowska E.

Animal Science Papers and Reports

|

2002

|

tom 20

|

nr 3

12

Streptomyces and Escherichia coli, model organisms for the analysis of the initiation of bacterial chromosome replication

88%

Messer W. , Zakrzewska-Czerwinska J.

Archivum Immunologiae et Therapiae Experimentalis

|

2002

|

tom 50

|

nr 6

13

A familial X-Y translocation: cytogenetic and molecular study

88%

Kusz K. , Wojda A. , Wisniewska M. , Latos-Bielenska A. , Jaruzelska J.

Journal of Applied Genetics

|

2001

|

tom 42

|

nr 2

14

Constitutional chromosome instability in families with patients affected by sporadic non-hereditary retinoblastoma

88%

Zajaczek S. , Gorski B. , Krzystolik Z. , Lubinski J.

Journal of Applied Genetics

|

1999

|

tom 40

|

nr 4

15

Fish chromosomes - current status of knowledge

88%

Jankun M.

Animal Science Papers and Reports. Supplement

|

2004

|

tom 22

|

nr 2

16

Chromosome arrangement within meiotic and somatic cells of Rhoeo spathacea

88%

Golczyk H.

Acta Biologica Cracoviensia. Series Botanica. Supplement

|

2000

|

tom 42

|

nr 1

17

Comparative mapping of Brassica and Arabidopsis

88%

Sadowski J. , Quiros C. F.

Journal of Applied Genetics

|

1996

|

tom 37A

18

Meiotic behaviour of chromosomes in PMCs and karyotype of Trifolium repens L. from Darjeeling Himalaya

75%

Majumdar S. , Banerjee S. , De K. K.

Acta Biologica Cracoviensia. Series Botanica

|

2004

|

tom 46

217-220

EN

Detailed analyses of the chromosome meiotic behaviour and of mitotic metaphase chromosomes (2n = 32), as well as stainability studies of pollen fertility, were carried out in order to determine the cytological status of amphidiploid Trifolium repens L. (Dutch white clover). In amphidiploid (allotetraploid) Trifolium repens L., diploid-like meiotic behaviour of chromosomes was found, with no multivalent formation, and a normal karyotype with a single pair of chromosome having a secondary constriction was observed. These characteristics indicate favourable genetic and cytological stability in nature, and high pollen fertility further enhances its usefulness in breeding.

19

New hardware engine for new operating systems

75%

Ahmadi N. , Kaveh M.

International Letters of Natural Sciences

|

2013

|

tom 05

EN

Genetic algorithm is a soft computing method that works on set of solutions. These solutions are called chromosome and the best one is the absolute solution of the problem. The main problem of this algorithm is that after passing through some generations, it may be produced some chromosomes that had been produced in some generations ago that causes reducing the convergence speed. From another respective, most of the genetic algorithms are implemented in software and less works have been done on hardware implementation. Our work implements genetic algorithm in hardware that doesn’t produce chromosome that have been produced in previous generations. In this work, most of genetic operators are implemented without producing iterative chromosomes and genetic diversity is preserved. Genetic diversity causes that not only don’t this algorithm converge to local optimum but also reaching to global optimum. Without any doubts, proposed approach is so faster than software implementations. Evaluation results also show the proposed approach is faster than hardware ones.

20

Possible ancient origin of heterochromatic JNK sequences in chromosomes 2R of Secale vavilovii Grossh.

75%

Achrem M. , Rogalska S. M. , Kalinka A.

Journal of Applied Genetics

|

2010

|

tom 51

|

nr 1

1-8

EN

Employing FISH analysis as well as BLAST and CUSTAL W (1.82) programs, we investigated types of DNA nucleotide sequences building an additional heterochromatic band in 2R chromosomes of 3 lines of Secale vavilovii Grossh. The probes used in FISH analysis were designed based on the reverse transcriptase sequence of Ty 1-copia and Ту 3-gypsy retrotransposons and the 5S rRNA gene sequence. No hybridization signals from the reverse transcriptase probes were observed in the chromosome region where the additional band occurs. On the other hand, signals were observed after hybridization with the 5S rDNA probe, clearly suggesting the presence of that type of sequences in the analyzed heterochromatin band. Using BLAST and CUSTAL W programs, we revealed high similarity of the JNK1 sequence to the 5S rRNA gene from Hordeum chilense (HCH1016, HCH1018, 88%) and to a fragment of the 5S rRNA sequence of H. marinum (HMAR003, 97%). In addition, the same fragment of JNK1 was shown to be very similar to the part of the Angela retrotransposon (92%) as well as to the SNAC 426K20-1 transposon (89%) belonging to CACTA family, both from Triticum monococcum, and to Zingeria biebersteiniana pericentromeric sequences (78%). The similarity of JNK1 to those sequences may be accidental or the JNK1 may represent an ancient mobile genetic element that caught the 5S rRNA sequence. During the evolution those sequences might have been accumulated in the particular region on the 2R chromosome. Our results suggest that the additional heterochromatin band in chromosomes 2R of S. vavilovii is a collection of defective genes and/or mobile genetic elements.