I have to make a rare correction, Eagle-- Suboxone has naloxone, the IV form of naltrexone. I'm sure you have the principals down though-- naloxone is completely irrelevant to the action of Suboxone, and is there for show more than anything-- it does nothing to contribute to the actions of the drug, but is used to deter people from injecting Suboxone, since then the naloxone would be active.
Eagle is correct, Cathy-- buprenorphine, Suboxone, and Subutex are all essentially identical.