nodulin MtN21 family protein. similar to nodulin MtN21 family protein [Arabidopsis thaliana] (TAIR:AT3G28100.1); similar to hypothetical protein [Vitis vinifera] (GB:CAN62735.1); similar to unnamed protein product [Vitis vinifera] (GB:CAO14809.1); contains InterPro domain Protein of unknown function DUF6, transmembrane; (InterPro:IPR000620)