So that means it can basically induce the synthesis of certain proteins that are needed by the cell at that given moment in time. Now, the final type of hormone we're going to discuss is our tyrosine derivative hormone, or simply the tyrosine hormone. So the tyrosine hormone is a type of hormone that is synthesized either in the cytosol by special types of enzymes or in the rough and the plasmic reticula. So these protein or these hormones can basically either be water soluble, in which case they do not need any type of carrier protein in the bloodstream, and they bind on to receptor proteins on the plasma membrane of the target cell. Or they can also be lipid soluble, in which case they bind to receptors in the nucleus of that cell and they create some type of transcription change. So these are the three different types of hormones.