Escorter protein required for import of MIC1 and MIC4 adhesins into the microneme. Interacts directly with MIC1. Part of the MIC6-MIC1-MIC4 complex. Released as soluble 35 kDa protein after proteolytic processing of the C-terminus (PubMed:11861763). Detected in tachyzoites (at protein level). Expressed in rapidly dividing tachyzoites. The EGF-like domains 2 and 3 and part of the acidic domain interact with the galectin-like domain of MIC1. The presence of at least one of the EGF-like domains, EGF-like domain 2 or EGF-like domain 3, is required for targeting of MIC1 and MIC4 into the microneme. Subject to proteolytic processing involving both the N-terminus and the C-terminus. The first EGF-like domain (EGF-like domain 1) is removed by proteolytic cleavage and is not present in the mature protein. Released as soluble 35 kDa protein after proteolytic processing at the C-terminus.