STP4 (SUGAR TRANSPORTER 4); carbohydrate transmembrane transporter/ sugar:hydrogen ion symporter. Identical to Sugar transport protein 4 (STP4) [Arabidopsis Thaliana] (GB:Q39228;GB:Q570J6); similar to monosaccharide transporter (STP9) [Arabidopsis thaliana] (TAIR:AT1G50310.1); similar to sugar transporter, putative [Arabidopsis thaliana] (TAIR:AT3G19940.1); similar to Os07g0106200 [Oryza sativa (japonica cultivar-group)] (GB:NP_001058704.1); similar to monosaccharide transport protein 1 [Zea mays] (GB:NP_001105681.1); similar to Os07g0559700 [Oryza sativa (japonica cultivar-group)] (GB:NP_001059981.1); contains InterPro domain General substr