Difference between Myoglobin and heme complex

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Tae Pasawat 2A
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Difference between Myoglobin and heme complex

Postby Tae Pasawat 2A » Mon Dec 07, 2020 9:29 am

can someone please explain the differences between myoglobin and the heme complex? Thank you!

Abby Lam 3F
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Re: Difference between Myoglobin and heme complex

Postby Abby Lam 3F » Mon Dec 07, 2020 9:39 am

I'm not completely sure, but I believe the heme complex is a structure with four Nitrogens around one Iron. The iron has two more available places to bond, in addition to the four Nitrogens around it. Myoglobin is a protein that contains the heme complex. Myoglobin carries oxygen to muscle cells by binding to extra spaces around the Iron.

Ria Nawathe 1C
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Re: Difference between Myoglobin and heme complex

Postby Ria Nawathe 1C » Mon Dec 07, 2020 9:47 am

I agree with the previous answer, the heme complex + the hystidine protein make up myoglobin.

Raashi Chaudhari 3B
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Re: Difference between Myoglobin and heme complex

Postby Raashi Chaudhari 3B » Mon Dec 07, 2020 3:49 pm

In a setup session my UA explained to us that the Heme Complex is one Iron, Fe, surrounded by & bonded to 4 Nitrogens, N. All of the Nitrogens are also connected. The Heme complex is therefore flat (like a pancake) and myoglobin is made up of these Heme Complexes. In myoglobin, O2 molecules will come an bind to the Fe; the myoglobin (I believe) helps oxygenate the blood, but I could be wrong about this part.

Raashi Chaudhari 3B
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Re: Difference between Myoglobin and heme complex

Postby Raashi Chaudhari 3B » Mon Dec 07, 2020 3:51 pm

Raashi Chaudhari 2D wrote:In a setup session my UA explained to us that the Heme Complex is one Iron, Fe, surrounded by & bonded to 4 Nitrogens, N. All of the Nitrogens are also connected. The Heme complex is therefore flat (like a pancake) and myoglobin is made up of these Heme Complexes. In myoglobin, O2 molecules will come an bind to the Fe; the myoglobin (I believe) helps oxygenate the blood, but I could be wrong about this part.

After reading other Chem Community posts, myoglobin helps bring oxygen to muscle tissue!

Madeline Ogden 3B
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Re: Difference between Myoglobin and heme complex

Postby Madeline Ogden 3B » Mon Dec 07, 2020 10:44 pm

From what I've gathered from my notes, the heme complex + protein = myoglobin, whereas hemoglobin contains 4 myoglobin-like molecules and assists with oxygen transportation in the blood. (For those wondering, these are my notes for Week 9, Lecture 1). Hope this helps!

Tae Pasawat 2A
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Re: Difference between Myoglobin and heme complex

Postby Tae Pasawat 2A » Sat Dec 12, 2020 10:52 pm

Hi, thanks so much for your answers. I have another question. Is it a dative bond that connects oxygen to the iron?

Thanks!

Chinyere Okeke 2J
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Re: Difference between Myoglobin and heme complex

Postby Chinyere Okeke 2J » Tue Dec 15, 2020 11:04 am

The difference is that the heme complex is a part of a myoglobin --> heme complex + protein = myoglobin.

JonathanM
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Re: Difference between Myoglobin and heme complex

Postby JonathanM » Tue Dec 15, 2020 2:03 pm

Tae Pasawat 2A wrote:Hi, thanks so much for your answers. I have another question. Is it a dative bond that connects oxygen to the iron?

Thanks!

So responding to the initial question, myoglobin is a heme complex with a histidine amino acid bonded to it, which is a molecule that typically helps build proteins. and The Oxygen is bonded to the iron via a dative bond.


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