Owing to the characterization that O-superfamily conotoxin has the sequence coded by conserved signal peptide, the cDNA of Conus striatus O-superfamily was cloned using the RACE method and was sequenced.

Conopeptides (Conotoxin) derived from tropical marine gastropod, cone snail ( Conus ) venoms have been an useful tool agent in neuro investigation and new drug source.

Two methods of different RNA extractions from Conus venom tube and toxin gland of seven cone snail species were performed.

Improving the thread pitch precision of double thread;

Removing of Spiral Mark on Workpiece Resulted from Cylindrical Grinding;