The TIC translocon, or translocon on the inner chloroplast membrane translocon is another protein complex that imports proteins across the inner chloroplast envelope. Chloroplast polypeptide chains probably often travel through the two complexes at the same time, but the TIC complex can also retrieve preproteins lost in the intermembrane space.
Like the TOC translocon, the TIC translocon has a large core complex surrounded by some loosely associated peripheral proteins like Tic110, Tic40, and Tic21.
The core complex weighs about one million daltons and contains Tic214, Tic100, Tic56, and Tic20 I, possibly three of each.