CNA

CNA is the fundamental genetic material of the Transformer species.

CNA is the genetic material that determines what Transformers are like. Tinkering with it can be dangerous and can have long lasting, negative effects.

Fiction

Transformer genetic material. Eat your hearts out, Watson and Crick.

Generation 2

The existence of Transformer genetic material is mentioned and seen when Perceptor and others are analyzing the Swarm. They note that its genetic material and cellular structure are identical to that of the Transformers species.

IDW

Out of malevolent curiosity, Jhiaxus altered the CNA of Arcee to introduce gender to the species. That's not going to come back to haunt him, no siree. Spotlight: Arcee

From Teletraan I: The Transformers Wiki, a Wikia wiki.