Figure 4From: Model of Cation Transportation Mediated by High-Affinity Potassium Transporters (HKTs) in Higher Plants Structure of AtHKT1;1 transporter. The letters with red font represent the highly conserved amino acid resides which may play crucial functions on cation selection and transport. H, membrane helix; I, inside loop; i, inside helix tail; O, outside loop; o, outside helix tail.Back to article page