Pseudocolored electron micrograph depicting what I think is 4 separate actual protein transcription events within an RER profile — see as four ribosomes on the RER membrane and the resulting 4 strands of protein within the lumen of the RER. The RER cisternal profile is pseudocolored cyan, the ribosomes (4 of them in particular) are blue, the proteins being synthesized, 4 of them, from adjacent ribosomes are in red, and the extracellular space beside the type II alveolar cell (from a ferret) is brownish, and the type II cell cytoplasm itself is a light violet color. This was an accidental find while perusing hundreds and hundreds of type II cell electron micrographs from a half dozen species of mammal.

This particular micrograph was not taken FOR this purpose, but it illustrates a point in time frozen by fixative and plastic three decades ago.