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Four peptide toxins, SHTX I–III with crab-paralyzing activity and SHTX IV with crab lethality, were isolated from the sea anemone Stichodactyla haddoni and their primary structures elucidated by protein sequencing and cDNA cloning. SHTX I (new toxin, 28 residues), II (analogue of SHTX I, 28 residues) and III (Kunitz-type protease inhibitor, 62 residues) are potassium channel toxins and SHTX IV (48...
A novel method, based on the hemolytic screening of a cDNA phage library, was developed to isolate cDNAs encoding grammistins (antibacterial peptide toxins) of the soapfish Pogonoperca punctata. As a result, cDNAs encoding six grammistins were isolated and elucidated for their nucleotide sequences. In common with the grammistins, the precursor protein is composed of a highly conserved signal peptide,...
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