The 26-Mb QTL region on SSC7 was also detected for cNurHScore (1.2% of genetic variance) and harbors the TINAG gene, which encodes a basement membrane glycoprotein that was initially identified as a target of antibodies in some forms of immunologically mediated tubulointerstitial nephritis (Katz et al. 1992). The gene discussed is TINAG; the disease is interstitial nephritis.