Isolation and Characterisation of Abrin from Abrusprecxtorius Wnn

Isolation and Characterisation of Anti-diabetic Pharmacological Activities of Phytoestrogens

Isolation and Characterisation of Actinobacteria from Algerian Sahara Soils with Antimicrobial Activities

Extreme ecosystems can be a source of untapped micro-organisms able to produce novel bioactive compounds of industrial interest. Consequently, in this work, 32 Actinomycetes were isolated from 6 soil samples collected from Algerian Sahara in searching for untapped producers of novel antimicrobial compounds. All the isolates were further subjected to antimicrobial screening against pathogenic ba...

Direct molecular cloning and expression of two distinct abrin A-chains.

The protein toxin abrin, which possesses an N-glycosylase activity toward eukaryotic 28 S rRNA, may have a potential in the deliberate eradication of certain cells. Here we report, by polymerase chain reaction technique, the isolation of genomic DNA sequences encoding two distinct abrin A-chains. A third sequence which encoded a part of a third type of A-chain was also isolated. The deduced ami...

Isolation of Chinese hamster ovary ribosomal mutants differentially resistant to ricin, abrin, and modeccin.

The molecular action of ricin A chain involves cleavage of the N-glycosidic bond between ribose and the adenine 4324 nucleotides from the 5' end of mammalian 28 S rRNA (Endo, Y., and Tsurugi, K. (1987) J. Biol. Chem. 262, 8128-8130). In this paper, four ricin- and abrin-resistant Chinese hamster ovary cell mutants that possess ribosomes resistant to this N-glycosidase action are described. Thre...

Isolation and comparison of galactose-binding lectins from Abrus precatorius and Ricinus communis.

The agglutinins present in the seeds of Abrus precatorius and Ricinus communis have been separated from the toxins, abrin and ricin, and extensively purified. The procedure involves ion exchange chromatography on DEAEand CMcellulose columns, affinity chromatography on Sepharose 4B columns, and sucrose gradient centrifugation. The purified agglutinins which possessed almost no toxic activity wer...