G proteins are so-called because they bind the guanine nucleotides GDP and GTP. They are heterotrimers (i.e., made of three different subunits) associated with. the inner surface of the plasma membrane and. transmembrane receptors of hormones, etc. These are called G protein-coupled receptors (GPCRs).
Apply the metal paint to the mailbox in slow and even sections. Be sure to cover every inch of the metal mailbox including the door, hanging lip and the back. When this layer is dry remove the tape from the mailbox flag.
Spray paint is also an option, but this type of paint wonât last as long on metal. Apply the paint evenly to the surface of the metal. If youâre using a brush, donât overload the bristles with paint, since this can be messy and create an overly thick first coat.