Effect of NaCl on enzymatic activities of SINV nsP1. A. Effect of NaCl on MTase activity. Transfer of [3H]-methyl from AdoMet to GIDP in the presence of increasing concentrations of NaCl. B. Autoradiograph of SDS-PAGE gel showing the formation of α-32P labeled m7GMP-nsP1 covalent complex in the presence of varying concentrations of NaCl. Lanes: 1, 0 mM NaCl; 2, 25 mM NaCl; 3, 50 mM NaCl; 4, 100 mM NaCl; 5, 200 mM NaCl; 6, 300 mM NaCl; 7, 500 mM NaCl.