We don't have synonyms for protogen yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are proton, photogen and protege.
(n) :
(furry fandom) A fictional anthropomorphic (furry) cyborg with a robotic chest and thighs, and a visor screen upon which the creature's face is displayed.
(n) :
(biochemistry) Clipping of protoporphyrinogen. [(biochemistry) Any of several precursors in the biosynthesis of protoporphyrin]
(n) :
(furry fandom) A fictional anthropomorphic (furry) cyborg with a robotic chest and thighs, and a visor screen upon which the creature's face is displayed.
(n) :
(biochemistry) Clipping of protoporphyrinogen. [(biochemistry) Any of several precursors in the biosynthesis of protoporphyrin]