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Scorpion venom contains a variety of small peptides, which can modulate Na + , K + , Ca 2+ and Cl - channel conductance in excitable and non-excitable tissues. A novel full-length cDNA encoding a new toxin-like peptide (named BmTXKS1) was isolated from the venom gland cDNA library of Buthus martensii Karsch. The precursor consists of 60 amino acid residues, with...
Three full-length cDNAs, one encoding the precursor of a β-toxin-like peptide (named BmKBT) and the other two encoding those of (MkTx I) homologues (named MkTx II and MkTx III, respectively), were isolated from a venom gland cDNA library of the Chinese scorpion Buthus martensii Karsch, by screening with a cDNA fragment generated by PCR. The encoded precursor of BmKBT contained 83 amino acid residues...
A full-length cDNA encoding the precursor of a K + channel toxin (BmTX2) was first isolated from a venom-gland cDNA library of the Chinese scorpion Buthus martensii Karsch. The precursor is composed of a signal peptide of 21 residues and a mature toxin of 37 residues with three disulfide bridges. The genomic gene of BmTX2 was also cloned and sequenced. It consisted of two exons, disrupted...
The cDNAs encoding nine novel α-toxin homologues were isolated from the venom gland cDNA library of the Chinese scorpion Buthus martensii Karsch (BmK). They are rich in AAAA and TTTT elements at the 5' UTRs. The flanking region of the translation initiation codon ATG is AAAATGAA, which is highly conserved in scorpion Na + , K + and Cl - channel toxin genes. These putative scorpion...
A full-length cDNA sequence encoding the precursor of a venom peptide with homology to chlorotoxin (named BmKCT) was isolated from a cDNA library made from the venom glands of the Chinese Scorpion Buthus martensii Karsch. The encoded precursor of BmKCT was 59 amino acid residues long including a signal peptide of 24 residues and a mature toxin of 35 residues with four disulfide bridges. The sequence...
From a cDNA library made from venom glands of Chinese scorpions of Buthus martensii Karsch, full-length cDNAs encoding precursors of two venom peptides have been isolated using a cDNA probe synthesized by polymerase chain reaction. Sequence analysis of the cDNAs revealed that one encoded precursor was 85 amino acid residues long including a signal peptide of 19 residues and a mature peptide (named...
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