1. The iron atom from this haem group undergoes redox reactions: 2. Two histidine residues from each subunit coordinate the haem . 3. Givat HaEm was the site of combat during the Six-Day War. 4. Cytochromes are conjugate proteins that contain a " haem " group. 5. The immediate precursor to haem is protoporphyrin IX ( PPIX ), an effective photosensitiser. 6. The haem molecule is synthesised from glycine and succinyl coenzyme A ( succinyl CoA ). 7. Hemopexin prevents haem -mediated oxidative stress. 8. Most haem peroxidases follow the reaction scheme: 9. The oxygen dependent enzyme haem -oxidase has also been put forward as a hypoxia sensor. 10. For example, blood is red because the haem pigment needed to carry oxygen is red.
