SBP (SQUAMOSA PROMOTER BINDING PROTEIN) family is a transcription factor family only exists in plant kingdom. AmSBPl and AmSBP2 of Antirrhinum majus are the first members of SBP family discovered in plants, and they were named after their in vitro binding activity with the promoter of SQUAMOSA. All the SBP proteins contain a highly conserved SBP-domain constituted by approximately 76 aminoacid residues and responsible for the interaction with the cis-regulatory elements located upstream of target genes. In ...