... wells and At the same time, the activity of the muscle was recorded with a pair of electrodes: one electrode was located in the middle, and the other at one end, of the trough Each pair of recording ... from amino-acid sequences Purification and synthesis of I -superfamily conotoxins D-Amino The excitatory peptides r11b and r11c were purified from the venom of the fish-hunting species Conus radiatus ... assay r11b, r11c and their l isomers In the case of r11b, a fivefold difference was observed in potencies of the d-Phe44 and l-Phe44 forms The estimate is based on comparison of the threshold dose...