ATP-driven exchange of histone H2AZ variant catalyzed by SWR1 chromatin remodeling complex     

Mizuguchi G  Shen X  Landry J  Wu WH  Sen S  Wu C 《Science (New York, N.Y.)》2004,303(5656):343-348

The conserved histone variant H2AZ has an important role in the regulation of gene expression and the establishment of a buffer to the spread of silent heterochromatin. How histone variants such as H2AZ are incorporated into nucleosomes has been obscure. We have found that Swr1, a Swi2/Snf2-related adenosine triphosphatase, is the catalytic core of a multisubunit, histone-variant exchanger that efficiently replaces conventional histone H2A with histone H2AZ in nucleosome arrays. Swr1 is required for the deposition of histone H2AZ at specific chromosome locations in vivo, and Swr1 and H2AZ commonly regulate a subset of yeast genes. These findings define a previously unknown role for the adenosine triphosphate-dependent chromatin remodeling machinery.  相似文献   

A study of kernel oils of some cultivated cucurbits     

B. M. Lal  N. Datta  T. R. Madaan 《Plant foods for human nutrition (Dordrecht, Netherlands)》1983,32(1):83-85

Oil content of the seed-kernels of 15 species ofCucurbitaceae family has been estimated. It ranged from 37.9 to 56.5%. The iodine values of the oils were from 87.8 to 149.9. Most of these oils were nearly colourless, odourless and of good appearance. The oil-free kernel meals of different cucurbit species had protein content ranging from 60 to 70%.  相似文献   

RNAi-Mediated Silencing of ITPK Gene Reduces Phytic Acid Content,Alters Transcripts of Phytic Acid Biosynthetic Genes,and Modulates Mineral Distribution in Rice Seeds   总被引：1，自引：0，他引：1  

Karmakar Aritra  Bhattacharya Sananda  Sengupta Shinjini  Ali Nusrat  Nath Sarkar Sailendra  Datta Karabi  K. Datta Swapan 《水稻科学》2020,27(4):315-328

  相似文献   

The repair of segmental bone defects with porous bioglass: an experimental study in goat     

Nandi SK  Kundu B  Datta S  De DK  Basu D 《Research in veterinary science》2009,86(1):162-283

This study was exclusively conducted to evaluate healing of surgically created defects on the radius of adult Black Bengal goat after implantation of porous bioglass blocks and compare the process kinetics with normal healing. Twelve Black Bengal goats were divided randomly into two groups: control and experimental group implanted with bioglass blocks. Unicortical bone defects in radius were generated in all animals under aseptic condition. Local inflammatory reaction and healing of wound, radiological investigations, histological studies, oxytetracycline leveling and angiographic studies were performed up to 90th day post-operatively and compared with normal healing. It has been found that extensive new bone formation originating from host bone towards the implant whereas in control, the process was active from both the ends; the defect site appeared as homogenous nonfluorescent area. Thus, porous bioglass promoted bone formation over the entire extension of the defect independent of size of block in comparison to control group.  相似文献   

In vitro isolation of solid novel flower colour mutants from induced chimeric ray florets of chrysanthemum     

A.K.A. Mandal  D. Chakrabarty  S.K. Datta 《Euphytica》2000,114(1):9-12

Rooted cuttings of white flowered cv. `Purnima' and red flowered cv. `Colchi Bahar' of Chrysanthemum morifolium were treated with gamma rays. Sectorial somatic mutations in flower colour were detected in both the cvs. Mutated ray florets (yellow colour for both the cvs) were cultured on agar-solidified Murashige & Skoog basal medium supplemented with sucrose and different combinations of BAP/kinetin and NAA. Direct shoot organogenesis was noticed within 2 weeks of culture initiation. SEM studies confirmed this direct shoot differentiation. The best regeneration was obtained on medium supplemented with 0.2 mg/l NAA and 0.5 mg/lBAP. Shoots regenerated from mutated ray florets were rooted in vitro and transferred to the field. These plants flowered true-to-explant floret colour and shape. These isolated yellow mutants were maintained vegetatively have proved to be true-to-type in two successive generations. This revised version was published online in July 2006 with corrections to the Cover Date.  相似文献