NIN and infection: A number of transcriptional regulators are activated during infection and organogenesis, including ERF REQUIRED FOR NODULATION1 (ERN1)25,26, CYCLOPS27, NODULE INCEPTION (NIN)28,29, NODULE SIGNALLING PROTEIN1 (NSP1) and NSP230 and NUCLEAR TRANSCRIPTION FACTOR YA1 (NF-YA1)31.