The method and effect of using self-prepared solid-phase iodine-activating beads to iodine-label protein were reported. The effects of various iodine-labeling conditions such as the dose and size of activating beads, pH value, temperature, labeling time periods, the volume, and the dose of protein on labeling rate were tested. The results showed that iodine-labeling can be performed under mild conditions and which has a wide application range and its labeling effectiveness is high and the substance labeled ...