A peptide is a...
biologically occurring short chain[s] of amino acid monomers linked by peptide (amide) bonds.
The addition of the word "cellular" indicates that these are found within the cell membrane of a living cell.
One of this episode's most effective images is Data's vision of Troi transformed into a cake in Ten Forward. "Troi as a cake got the most fevered response from the art department of any-thinganything that we have ever done in the four years that I have been here/ laughs Jeri Taylor. They were so disturbed and con-cernedconcerned about this that the entire depart-mentdepartment stayed after the production of it to implore us not to do this. Brannon and I were somewhat mystified by this because we didn't see it as that big a problem. Brannon had shot a student film in which he had done something very similar and for $1.98 he had managed to bring it off. Then he found a rock video that had a similar kind of thing and we were just sure that it could work. The only prob-lemproblem was that Patrick [Stewart], who directed it, shot one angle that we had expressly told him not to shoot and it made it very clear that it was someone's neck coming out of a cake."
Where do these surreal dream images come from? Braga speculates, "I could say something clever like I've always wanted to see somebody eat Counselor Troi, but the truth is those kinds of images perhaps are all most attractive to me because I don't under-standunderstand where they come from. I see the Freudian value in darker imagery, more bizarre imagery and what was especially fun about putting them in the Star Trek universe is they're such an incongruous juxtaposition to what people expect from The Next Generation, which is a somewhat sterile, reality-based universe. So, when suddenly you got these kind of completely disarming and disturbing images, it works” Captains' Logs: The Unauthorized Trek Voyages