Why do you like to use radioactive iodine to label protein while many labs have abandoned it? You will need authorization, training to handle radioactive material, and expensive disposal of radioactive waste.
There are many nonradioactive methods of labeling proteins. For example, fluorescent label or Biotin-label can be done easily.
Not affiliated with any company. Mention of a specifc product does not imply my endorsement of the product. No conflict of interest or guarantee to work on the advice given. Do as I say, not as I do. Not liable to the loss of your valuable samples.