Functions in floral reproductive organ identity in the third whorl and floral determinacy specification by specifically promoting the processing of AGAMOUS (AG) pre-mRNA. Functions in association with HUA1 and HUA2. Interacts with HUA1 (PubMed:15310842). Interacts with FLK and PEP (PubMed:25658099). A number of isoforms are produced. According to EST sequences. Expressed in inflorescence meristem during flower development at least until stage 6 of development. Floral organ defects such as reproductive-to-perianth organ transformation and loss of floral determinacy.