I've hit somewhat of a bump in my LOR requests. My ochem professor declined to write me a letter. It's understandable considering I took his class in 2006.
I graduated in 2009. My school has no premed committee so I have to request 3 letters. I was able to get a non science prof and my old physics prof to write me a rec this week. In 2005, my gen chem professor had written me a rec letter which can be used for medical school. It is currently stored in the interfolio service at my school. Unfortunately he passed away in 2008. Out of all the science professors I've intereacted with over the years, he knew me the best because I had visited him during office hours every week. I also had him for the entire year because at that time he taught me the entire year for gen chem (all 3 quarters). The thing is, while I could use this letter, I'm not sure what to put as his email or phone number considering the fact that he's no longer with us. 🙁
I could get an old neuroscience prof to write me a letter, but he doesn't know me that well. And I wonder if he'd say yes. My other rec letters (graduate advisor (MPH program), medical director at the org at work) will shed a ton of light to my ability to handle medicine though and will be more recent.
I was exclusively a psych major in undergrad, so I don't have a lot of science profs to begin with.