S1A). Unlike fhRPE, Claudin-1, Claudin-2, and Claudin-10 could not be detected (data not shown). In summary, the cultured ahRPE ... Claudin-16 and claudin-19 function in the thick ascending limb. Curr Opin Nephrol Hypertens. 2010; 19: 483-488. ... Claudin-19 is significantly expressed at higher levels in ahRPE than nhRPE suggesting a change in the ratio of Claudin-19/ ... 40 Immunoblotting revealed the presence of claudin-3 and claudin-19 in amounts comparable to fhRPE (Supplementary Fig. ...