This is a family of TCP plant transcription factors. TCP proteins were named after the first characterised members (TB1, CYC and PCFs) and they are involved in multiple developmental control pathways [1][2][3]. This region contains a DNA binding basic-Helix-Loop-Helix (bHLP) structure [1][3].

1: The TCP domain: a motif found in proteins regulating plant growth and development. Cubas P, Lauter N, Doebley J, Coen E; Plant J 1999;18:215-222. PMID:10363373

2: TCP transcription factors control the morphology of shoot lateral organs via negative regulation of the expression of boundary-specific genes in Arabidopsis. Koyama T, Furutani M, Tasaka M, Ohme-Takagi M; Plant Cell. 2007;19:473-484. PMID:17307931

3: TCP Transcription Factors Predate the Emergence of Land Plants. Navaud O, Dabos P, Carnus E, Tremousaygue D, Herve C; J Mol Evol. 2007;65:23-33. PMID:17568984