nonchelated
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chelate — chelatable, adj. /kee layt/, adj., n., v., chelated, chelating. adj. 1. Chem. a. of or noting a heterocyclic compound having a central metallic ion attached by covalent bonds to two or more nonmetallic atoms in the same molecule. b. of or noting… … Universalium
zinc protoporphyrin — free erythrocyte protoporphyrin that is bound to zinc. Levels of this chelated form are elevated in iron deficiency and lead poisoning; the nonchelated form is elevated in erythropoietic protoporphyria; and neither is elevated in thalassemia … Medical dictionary
