Bacteriophage T7 is the prototype of a group of bacterial viruses that each encode a single subunit DNA-dependent RNA polymerase (RNAP). Other members of this class include the coliphages T3 and BA14, the Salmonella phage SP6, the Pseudomonas phage gh1 and the Klebsiella phage K11 (9,16). The phage RNA polymerases have proven to be useful in a variety of applications, including large-scale RNA ...

In an attempt to develop the food composition table for Bangladesh, the nutritional composition of nine varieties of orange-fleshed sweet potato was analyzed together with total carotenoids (TCC) and total polyphenol content (TPC). Each variety showed significant variation in different nutrient contents. The quantification of the TCC and TPC was done by spectrophotometric measurement, and the p...

The secondary structure of the SP6/mouse insulin precursor RNA was determined by psoralen cross-linking experiments. A series of long-range contacts occur within the left half of the pre-mRNA that contains the intervening sequence. Multiple secondary structures for the pre-mRNA exist since some of the interactions share common sites. In splicing buffer but without the splicing extract added, ma...

Plasmid encoded SHV enzymes represent an important sub-group of class A β-lactamases causing an ESBL phenotype which is increasingly found in Enterobacteriaceae including Klebsiella pneumoniae. The chromosomally encoded β-lactamase LEN and OKP enzymes, which so far only have been found in K. pneumoniae, do not hydrolyse extendedspectrum cephalosporins. In the present study, multiple displacemen...

Molecular information theory was used to create sequence logos and promoter models for eight phages of the T7 group: T7, phiA1122, T3, phiYeO3-12, SP6, K1-5, gh-1 and K11. When these models were used to scan the corresponding genomes, a significant gap in the individual information distribution was observed between functional promoter sites and other sequences, suggesting that the models can be...

We describe the construction of a recombinant DNA plasmid, consisting of the vector pBR322 and full-length tissue-type plasminogen-activator (t-PA) cDNA, by using polyadenylated RNA from cultured Bowes melanoma cells as substrate. A 1280-base-pair PstI restriction fragment, covering the 3' untranslated region and part of the coding region for the t-PA L-chain, was used as a radiolabelled probe ...