by Christoph — As a bac­te­ri­ol­o­gist, when you are in­ter­ested in the function(s) of a par­tic­u­lar pro­tein you're hardly sat­is­fied with bio­chem­i­cal analy­ses and study­ing ex­pres­sion pat­terns. What you'd re­ally like to know is where your pro­tein is lo­cal­ized, where it's ac­tu­ally ac­tive in liv­ing cells. None of the nu­mer­ous stains and dyes used in mi­croscopy...