<unk> s are a group of rare disorders passed down through families, in which an important part of hemoglobin, called heme, is not made properly. Heme is also found in myoglobin, a protein found in certain muscles.
Porphyria
Chalicosis
Albinism
Xanthinuria
Scurvy
Acute intermittent porphyria
Trimethylaminuria
Prurigo nodularis