Fig. 2.

Transcriptional Regulatory Network motifs. A) Simple regulation B) Auto-regulation C) Coherent type-1 Feed Forward Loop D) Incoherent type-1 Feed Forward Loop E) Positive Feedback Loops F) Negative Feedback Loops G) Single-Input Module with positive regulation H) Single-Input Module with negative regulation I) Dense Overlapping Regulon J) Feedback Loop comprising two positive transcription interactions K) Feedback Loop comprising two negative transcription interactions L) Core transcriptional Regulatory Circuitry.