This domain is found at the N terminal of the mitochondrial ATPase BSC1. It encodes the import and intramitochondrial sorting for the protein [1].

1: Mitochondrial protein import: recognition of internal import signals of BCS1 by the TOM complex. Stan T, Brix J, Schneider-Mergener J, Pfanner N, Neupert W, Rapaport D; Mol Cell Biol. 2003;23:2239-2250. PMID:12640110