Heme complex and myoglobin/hemoglobin

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Connor Ho 1B
Posts: 102
Joined: Sat Aug 17, 2019 12:17 am

Heme complex and myoglobin/hemoglobin

Postby Connor Ho 1B » Sat Dec 07, 2019 9:39 pm

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
Posts: 98
Joined: Sat Aug 24, 2019 12:17 am

Re: Heme complex and myoglobin/hemoglobin

Postby Sidharth D 1E » Sat Dec 07, 2019 9:44 pm

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
Posts: 101
Joined: Wed Sep 18, 2019 12:21 am

Re: Heme complex and myoglobin/hemoglobin

Postby Sofia Barker 2C » Sun Dec 08, 2019 5:52 pm

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
Posts: 100
Joined: Thu Jul 25, 2019 12:15 am

Re: Heme complex and myoglobin/hemoglobin

Postby Julie Park 1G » Sun Dec 08, 2019 11:10 pm

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


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