Which of the following hemoglobin subunits is responsible for the binding of nitric oxide, a molecule involved in vasodilation?

A Alpha-globin
B Beta-globin ✓
C Gamma-globin
D Delta-globin

Explanation

The beta-globin subunit of hemoglobin is responsible for the binding of nitric oxide, which plays a role in vasodilation.

Mnemonic

'Beta' → 'bigger' role in NO binding

Source

Journal of Biological Chemistry
Hematology Hematology: Hemoglobin and Oxygen Transport Hematology: Hemoglobin and Oxygen Transport Hard MEDICAL Confidence: medium