Myoglobin

[005199750]

"The amino acid histidine binds to the heme complex iron to form myoglobin." Why can four myoglobins form a hemoglobin, and why can myoglobin bind to four O2 molecules?

[Chem_Mod]

Hemoglobin by definition is composed of four myoglobins. Myoglobin is a Fe coordination complex that has 5 bonds. Fe prefers to have 6 bonds, and the extra spot can bind a molecule of O2.

[Norman Dis4C]

Since each myoglobin binds to one O2. 4 myoglobin, which is hemoglobin, should bind to 4 O2.

[Mai V 4L]

Will this be on the final?

[philipraj_1F]

Myoglobin can bond to one O2 molecule.

[Annie Ye]

hemoglobin is made up of 4 myoglobins. each myoglobin can attach to O2.

[Jiapeng Han 1C]

Myoglobins don't necessarily form hemoglobin, they are just structurally very similar to the sub-unit of hemoglobin. Also, each myoglobin can only bind to one oxygen molecule.