POK (POKY POLLEN TUBE). similar to Vps52/Sac2 family protein [Arabidopsis thaliana] (TAIR:AT1G71300.1); similar to hypothetical protein OsJ_010819 [Oryza sativa (japonica cultivar-group)] (GB:EAZ27336.1); similar to hypothetical protein OsI_011707 [Oryza sativa (indica cultivar-group)] (GB:EAY90474.1); similar to unnamed protein product [Vitis vinifera] (GB:CAO41972.1); contains InterPro domain Vps52/Sac2 (InterPro:IPR007258)