- Lemansky P, Fester I, Smolenova E, Uhländer C, Hasilik A. The cation-independent mannose 6-phosphate receptor is involved in lysosomal delivery of serglycin. J Leukoc Biol. 2007;81:1149-58 pubmed..We conclude that the CI-MPR participates in lysosomal and granular targeting of serglycin and basic proteins such as lysozyme associated with the proteoglycan in hematopoietic cells. ..