what is pyroluria
PYROLURIA. Pyroluria is a genetically determined chemical imbalance involving an abnormality in hemoglobin synthesis. Hemoglobin is the protein that holds iron in the red blood cell.Individuals with this disorder produce too much of a byproduct of hemoglobin synthesis called kryptopyrrole (KP) or hemepyrrole..Kryptopyrrole has no known function in the body and is excreted in urine.emoglobin is the protein that holds iron in the red blood cell. Individuals with this disorder produce too much of a byproduct of hemoglobin synthesis called kryptopyrrole (KP) or hemepyrrole.. Kryptopyrrole has no known function in the body and is excreted in urine.