Velika, just for giggles, I went to read the source article for that interesting news report about the brain protein that goes awry in bipolar disorder. Caveat lexor. The protein the scientists were looking at has a very tenuous connection to bipolar disorder, at best. Mostly they were looking at proteins that affect brain cell structure (in mice, who don't really get manic depressive - or at least, who would know if they did??), did some quite lovely studies on the molecular organization of synapses, and concluded with a leap in the dark toward clinical application, by raising the possibility that this could (perhaps, maybe) play a role in bipolar pathology.
Anjae, I feel this is precisely the reason we have psychiatrists, in addition to researchers. I say this humbly as a researcher. I study cell structure myself, I know well these leaps in the diagnostic dark - you're obliged to make 'em to get anyone else in the universe interested in your favorite molecule... but as you would know better than many, there's a huge gap between brain structure and function, and we're all more complex than the sum of our parts. There are things psychiatrists do understand about how the brain works from watching and listening, that can't be seen by pulling the brain up by its roots (or from blood tests). FWIW I'm confident MLC will be better understood once the peculiar stigma attached to this diagnosis lessens (schadenfreude on the part of middle aged docs and researchers, perhaps?), and people treat it like any other disorder of the mind, a puzzle to be solved.
....climbing off scientific soapbox now.... oof.
"You have a right to action, not to the fruit thereof; shoot your arrow, but do not look to see where it lands." -Bhagavad Gita