I need a picture of a gel I can put into this manuscript that's a placeholder. Just until the experiment's finished and I have the real data. Let's see... Let's look through all my old lab notebooks and see if I can find a gel that's just the right size. With exactly the right number of lanes. And exactly the right number of bands in exactly the places I'm expecting them of course! Just as a placeholder...
<six months later>
Oh gee willikers! I forgot to take out that gosh darn placeholder figure and now it's published. Oopsie!