... PA1b: five susceptiblestrains ÔS. oryzae WAA42, Benin, and Bouriz, S. zeamaisLS, and S. granarius BrayardÕ and four fully resistantS. oryzae strains ÔISOR3, Mex1, China and GVÕ harboring a ... specific radioactivity of the125I-labelledPA1b, calculated by the ratio of the radioactivity measuredby gamma counting and the amount of peptide evaluated byabsorbance at 210 nm during HPLC analysis, ... ligand rangingfrom 0.35 to 3.2 nM. The saturation plot showed that thespecific binding was saturable, and the deduced Scatchardplot revealed a Kdof 2.6 nM and a maximal bindingcapacity...