The S2 portion of the tubule is involved in reabsorption of water and sodium chloride[GO]. [ http://amigo.geneontology.org/amigo/term/GO:0072032 ]

Synonyms: proximal tubule segment 2 S2 portion of renal tubule S2 portion of tubule segment 2 of proximal tubule

This is just here as a test because I lose it