PDB ID is 1RZL.

Exlperimental method is X-ray diffraction.

Location of its four helixs are CYS 3---ALA 17, ALA25---ALA 37, THR 41---ARG 56 and ALA63---CYS 73.

Positions of its four disulfide bonds are CYS 3---CYS 50, CYS 13---CYS 27, CYS 28---CYS 73, CYS 48---CYS 87.

Name of the hetero atoms are CXS 3-CYCLOHEXYL-1-PROPYLSULFONIC ACID and SO4 SULFATE ION.

Two diferent views of this protein by Rasmol.
   
 
 A cartoon present with its four dislfide bonds in yellow color.

 Table of the bond length of each disulfide bond.

From	To	Bond length
CYS 3:SG	CYS 50:SG	2.02
CYS 13:SG	CYS 27:SG	2.00
CYS 28:SG	CYS 73:SG	2.02
CYS 48:SG	CYS 87:SG	2.01

the average bond length of disulfide bonds is 2.0125.