Hi -

Apparently the protein is more digestable when roasted - at least for cattle.

http://www.dfrc.wisc.edu/RS95_pdfs/fu8.pdf

The breakdown varies depending on the source - here' s an example http://www.agridept.gov.lk/Techinfor.../Sbean.htm#int

you can get more information on breakdown by searching google:

http://www.google.com/search?q=prote...UTF-8&oe=UTF-8

good luck -