Purification, crystallization and preliminary X-ray analysis of the disintegrin contortrostatin from Agkistrodon contortrix contortrix snake venom

Contortrostatin, a small homodimeric protein (64 residues per chain) from southern copperhead snake venom, has been crystallized successfully. Crystals of the title compound, which is a member of the disintegrin family of proteins, diffract up to a maximum resolution of 1.7 Å.