Fig. 4.
Purification of IIH6+ proteins from rabbit kidney. IIH6 immunoreactivity of rabbit kidney extracts (A and B, Triton extract; C and D, urea extract) applied to columns (A and C, DEAE-cellulose; B and D, IIH6-Sepharose), and samples separated by the columns (the void and eluted fractions). The fractions TEA1-3 and NaCl-TEA1-3 derived from the Triton extract were subjected to trypsin digestion and analyzed by MS (Table II). In the cases of the TEA-2 and NaCl-TEA1-3 fractions derived from urea extract, the areas in the SDS-PAGE gels indicated by squared brackets were excised and analyzed by in-gel trypsin digestion and subsequent MS (Table III).