JIMD Rep. 2023 Jun 20;64(4):293-299. doi: 10.1002/jmd2.12377. eCollection 2023 Jul. ABSTRACT Lysinuric protein intolerance (LPI) is a rare autosomal recessive disorder affecting the transport of cationic amino acids. Elevated plasma zinc concentrations have been described in patients with LPI. Calprotectin is a calcium- and zinc-binding protein, produced by polymorphonuclear leukocytes…