If your doing good research in a good lab, that is what is important. Otherwise, LORs carry a ton of weight, so does research experience, and a strong personal statement. If you can get published that will help you greatly. If you can wait to start grad school until you are published, you can go anywhere you listed - and without a publication, you likely will still end up where you listed if you have truly done research for 3.5 years full time. I was accepted to schools you listed, so feel free to PM me if you want to talk more about programs in mol bio.