Molecular weights of Insulin A chain and B chain? - (Feb/03/2012 )

Hi,
What are the molecular weights of human Insulin A chain and B chain?

Thanks,

hi

Bell GI, Pictet RL, Rutter WJ, Cordell B, Tischer E, Goodman HM (March 1980). "Sequence of the human insulin gene". Nature 284 (5751): 26–32.

and

http://macromoleculeinsights.com/insulin.php

cheers,

thanks for the links but i am still confused.

The weights of bovine insulin for A chain is 2.4 kDa and B chain is 3.4 kDa. Shouldn't it be approx. similar to weights of respective chains of human insulin ?