Atlas One · Host Biology · Scale 03 — Molecular

Hemoglobin

α₂β₂ tetramer (~64.5 kDa) carrying 4 haem-Fe²⁺ groups; binds O₂ cooperatively (Hill n≈2.7) via T↔R allostery. Bohr effect and 2,3-BPG tune O₂ delivery. HbS mutation causes sickle-cell disease; thalassaemias disrupt chain synthesis.

Also known as: Hb, haemoglobin, HbA, HbF, HbS, oxyhaemoglobin

Scale 03 — MolecularScale
draftStatus
2026-06-05Last Reviewed
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hemoglobin

Hemoglobin

α₂β₂ tetramer (~64.5 kDa) carrying 4 haem-Fe²⁺ groups; binds O₂ cooperatively (Hill n≈2.7) via T↔R allostery. Bohr effect and 2,3-BPG tune O₂ delivery. HbS mutation causes sickle-cell disease; thalassaemias disrupt chain synthesis.