ciaweth wrote...
You mean thalidomide? I'm trying to read up on what exactly about that drug caused the issues, but I'm not understanding it. Totally outside my area of expertise.
Basically, a molecule has to be recognized like a key to a lock. If the molecule doesn't fit, it's not going to do what you need. But that doesn't mean the molecule isn't going to unlock something else. In Thalidomide's case, the R-molecule was supposed to relieve nausea. The S-molecule was just the junk you get from the normal synthesis of the drug, as it synthesizes in a 50/50 split of both forms of the molecule.
Only the S-molecule wasn't junk. It didn't do anything for nausea, but it did manage to unlock something else, which was the development cycle of a fetus, and prevent limb formation. And since pregnant women tend to get morning sick...
Anyway, that's the issue with dextro/levo amino acids -- two different molecular shapes. The human body is designed to recognize certain protein shapes. The turian body is designed to recognize the opposite. Throw a bunch of differently shaped proteins at you... odds are your body doesn't do anything with them in a biochemical sense because not much in the human body is designed to recognize a dextro-oriented protein. No key fits the locks. Allergic reaction, perhaps. But then again, you can have an allergic reaction to a levo-oriented protein.
Modifié par Pacifien, 18 août 2010 - 01:54 .