PC-MYB1 (myb domain protein 3R1); DNA binding / transcription coactivator/ transcription factor. Identical to Myb-related protein 3R-1 (MYB3R-1) [Arabidopsis Thaliana] (GB:Q9S7G7;GB:O65528;GB:Q9LDX5); similar to MYB3R-4 (C-MYB-LIKE TRANSCRIPTION FACTOR 3R-4, myb domain protein 3R-4), DNA binding / transcription factor [Arabidopsis thaliana] (TAIR:AT5G11510.2); similar to MYB3R-4 (C-MYB-LIKE TRANSCRIPTION FACTOR 3R-4, myb domain protein 3R-4), DNA binding / transcription coactivator/ transcription factor [Arabidopsis thaliana] (TAIR:AT5G11510.1); similar to unnamed protein product [Vitis vinifera] (GB:CAO44062.1); contains InterPro domain Myb