Biochemistry 4th Edition by Christopher Mathews,Kensal van Holde, Dean Appling, Spencer Anthony Cahill

Exercise 9

Note that some of these problems refer to information presented in the Tools of Biochemistry 5A-D.
Apamine is a small protein toxin present in the venom of the honeybee. It has the sequence
(a) It is known that apamine does not react with iodoacetate (see page 169). How many disulfide bonds are present
(b) Suppose trypsin cleavage gave two peptides. Where is(are) the S -Sbond(s)