PTAC18 (PLASTID TRANSCRIPTIONALLY ACTIVE18). similar to unknown protein [Arabidopsis thaliana] (TAIR:AT2G32650.2); similar to unknown protein [Arabidopsis thaliana] (TAIR:AT2G32650.1); similar to unknown [Brassica rapa] (GB:ABL97961.1); contains InterPro domain RmlC-like jelly roll fold (InterPro:IPR014710); contains InterPro domain Protein of unknown function DUF861, cupin-3 (InterPro:IPR008579); contains InterPro domain Cupin, RmlC-type (InterPro:IPR011051)