H
H. K. Das
Researcher at Jawaharlal Nehru University
Publications - 5
Citations - 98
H. K. Das is an academic researcher from Jawaharlal Nehru University. The author has contributed to research in topics: Gene & Azotobacter vinelandii. The author has an hindex of 4, co-authored 5 publications receiving 98 citations.
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Journal ArticleDOI
Cloning and sequence analysis of gyrA gene of Klebsiella pneumoniae
Goberdhan P. Dimri,H. K. Das +1 more
TL;DR: The gene gyrA encoding the DNA gyrase A subunit of Klebsiella pneumoniae has been cloned in the plasmid pBR322 and some very interesting differences have, however, been found in the promoter region.
Journal ArticleDOI
Transcriptional regulation of nitrogen fixation genes by DNA supercoiling
Goberdhan P. Dimri,H. K. Das +1 more
TL;DR: These results suggest that nif gene regulation by oxygen may be mediated through the alteration of the superhelical status of the promoter of the nifLA regulatory operon, in addition to the action of thenifL gene product.
Journal ArticleDOI
Segregation characteristics of multiple chromosomes ofAzotobacter vinelandii
TL;DR: The results suggest the presence of multiple (possibly identical) copies of the genome in A. vinelandii and an equilibrium between alleles of the same gene with and without the transposon was evident during random segregation.
Journal ArticleDOI
Cloning of a positive regulatory element involved in nitrogen fixation inAzotobacter vinelandii
M. Amarender Reddy,H. K. Das +1 more
TL;DR: A positive regulatory gene has been cloned from Azotobacter vinelandii, using its ability to activate the expression of nifH: lacZ fusion in E. coli to activation the transcription from the P1 promoter of Rhizobium meliloti.