Heme complex and myoglobin/hemoglobin

[Connor Ho 1B]

Can someone please explain how myoglobin/hemoglobin are related to the heme complex, and what we should know about it for the exam?

[Sidharth D 1E]

A heme complex attached to a protein is what makes up myoglobin (which can attach to a single O₂ molecule. Four myoglobin together make up a single hemoglobin.

[Sofia Barker 2C]

Each myoglobin binds to an O2, and four myoglobin make up a hemoglobin. Remember that a heme complex is made up of an iron ion bound to tetradentate porphyrin.

[Julie Park 1G]

Myoglobin:
x1 O2 possible bonding
Transports O2 in muscle cells

Hemoglobin:
x4 O2 possible bonding
Involved in red blood cells

Also, the lone pair on CO can bind to hemoglobin. These leads to "suffocation at the molecular level", and explains why CO is toxic