Peroxisomes Sorting Signals Sorting signals direct the transport of proteins from ribosomes. Gated transport 2. Transmembrane transport 3. Vesicular transport Fig. 12-8 Two ways of building a sorting signal into a protein Signal peptides direct delivery of proteins.
Signal patches are separate patches of sequence that interact by folding.
The signal peptides and patches are recognized by complementary receptor proteins in the target organelles. The Transport of Molecules in and out of the Nucleus Fig. The nuclear envelope Nuclear pores perforate the nuclear envelope. Nuclear localization signals direct nuclear proteins to the nucleus. The nuclear envelope is disassembled during mitosis.