Involved in protein precursor import into chloroplasts. May be part of an intermediate translocation complex acting as a protein-conducting channel at the inner envelope. Part of the Tic complex. Belongs to the TIC214 family. Could be the product of a pseudogene. In M.polymorpha this protein is in two parts: ORF 1068 (N-terminal) and ORF 464 (C-terminal). It also could be due to a frameshift error.