biogen
'a hypothetical protein assumed to be the basis of the formation and functioning of body cells and tissues’
Lexical development traced from the Tamil root:
E. biogene < bio + -gen ‘thing that produces or causes’ < F. -gène < Gk. -genes ‘born of, produced by’ < genos ‘birth,’ genea ‘race, family’ < jen < gene- < Tamil īṉ