Well. No. Because, until a few years ago, nobody checked the gels for Photoshopping.
Mr. Rossner became a leading crusader for such checks after he accidentally stumbled upon manipulated images in an article submitted to The Journal of Cell Biology six years ago, when he was the publication's managing editor.
Since then,
The Journal of Cell Biology has checked 250 suspect papers and confirmed 25 that were faked.
I don't like this scientists-fake-stuff any more than the next girl, but there you have it. Who knows what slips thru?