RD28 (plasma membrane intrinsic protein 2;3); water channel. Identical to Aquaporin PIP2-3 (PIP2-3) [Arabidopsis Thaliana] (GB:P30302;GB:Q8L5V1); similar to PIP2B (plasma membrane intrinsic protein 2,2), water channel [Arabidopsis thaliana] (TAIR:AT2G37170.1); similar to Plasma membrane aquaporin 2b [Raphanus sativus] (GB:BAA92260.1); contains InterPro domain Aquaporin; (InterPro:IPR012269); contains InterPro domain Major intrinsic protein; (InterPro:IPR000425)