2. Signal peptides and signal patch direct proteins to correct cellular address Each of these modes of protein transfer is usually selective quided by sortting signals in the transported proteins that are recognized by complementary receptor proteins in the target organelles. Such as to be recognized by receptor proteins associated with NPC by the translocator in the membrane to be acrossed, by a complementary receptor in the appropriate membrane to be formed to transport vesicles or to be retained in certain organelles2. Signal pepitides and signal patch direct proteins to correct cellular address Each of these modes of protein transfer is usually selective quided by sortting signals in the transported proteins that are recognized by complementary receptor proteins in the target organelles. Such as to be recognized by receptor proteins associated with NPC, by the translocator in the membrane to be acrossed, by a complementary receptor in the appropriate membrane to be formed to transport vesicles or to be retained in certain organelles