A membrane blotting method for following the time course of protein radioiodination using Iodobeads.

A method for monitoring and optimizing the incorporation of radioiodide into protein is described. The use of immobilized chloramine-T (Iodobeads) combined with timed blots on nitrocellulose forms the basis of an efficient assay system. Results with Iodobeads and with the commonly utilized soluble form of chloramine-T are compared.