Most of the amino acids in hemoglobin form alpha helices, connected by short non-helical segments. (Hemoglobin has no beta strands and no disulfide bonds.) A rainbow coloring scheme from the N-terminus to the C-terminus helps to discern the separate alpha helices. This is a cartoon representation. We'll focus on a single alpha helix. This helix is at the protein-water interface. Here is the isolated alpha helix. The backbone representation connects alpha carbon positions in this alpha helix. These lines do not represent the positions of any actual chemical bonds. Here are the actual bonds of the alpha helix backbone: three atom repeats of nitrogen, alpha carbon, carboxy carbon. Hydrogen bonds (white) stabilize the alpha helix. The sidechains on the alpha carbons are shown. Now the sidechain elements are identified:
A rainbow coloring scheme from the N-terminus to the C-terminus helps to discern the separate alpha helices. This is a cartoon representation. We'll focus on a single alpha helix. This helix is at the protein-water interface. Here is the isolated alpha helix. The backbone representation connects alpha carbon positions in this alpha helix. These lines do not represent the positions of any actual chemical bonds. Here are the actual bonds of the alpha helix backbone: three atom repeats of nitrogen, alpha carbon, carboxy carbon. Hydrogen bonds (white) stabilize the alpha helix. The sidechains on the alpha carbons are shown. Now the sidechain elements are identified:
This is a cartoon representation. We'll focus on a single alpha helix. This helix is at the protein-water interface. Here is the isolated alpha helix. The backbone representation connects alpha carbon positions in this alpha helix. These lines do not represent the positions of any actual chemical bonds. Here are the actual bonds of the alpha helix backbone: three atom repeats of nitrogen, alpha carbon, carboxy carbon. Hydrogen bonds (white) stabilize the alpha helix. The sidechains on the alpha carbons are shown. Now the sidechain elements are identified:
We'll focus on a single alpha helix. This helix is at the protein-water interface. Here is the isolated alpha helix. The backbone representation connects alpha carbon positions in this alpha helix. These lines do not represent the positions of any actual chemical bonds. Here are the actual bonds of the alpha helix backbone: three atom repeats of nitrogen, alpha carbon, carboxy carbon. Hydrogen bonds (white) stabilize the alpha helix. The sidechains on the alpha carbons are shown. Now the sidechain elements are identified:
Here is the isolated alpha helix. The backbone representation connects alpha carbon positions in this alpha helix. These lines do not represent the positions of any actual chemical bonds. Here are the actual bonds of the alpha helix backbone: three atom repeats of nitrogen, alpha carbon, carboxy carbon. Hydrogen bonds (white) stabilize the alpha helix. The sidechains on the alpha carbons are shown. Now the sidechain elements are identified:
The backbone representation connects alpha carbon positions in this alpha helix. These lines do not represent the positions of any actual chemical bonds. Here are the actual bonds of the alpha helix backbone: three atom repeats of nitrogen, alpha carbon, carboxy carbon. Hydrogen bonds (white) stabilize the alpha helix. The sidechains on the alpha carbons are shown. Now the sidechain elements are identified:
Here are the actual bonds of the alpha helix backbone: three atom repeats of nitrogen, alpha carbon, carboxy carbon. Hydrogen bonds (white) stabilize the alpha helix. The sidechains on the alpha carbons are shown. Now the sidechain elements are identified:
Hydrogen bonds (white) stabilize the alpha helix. The sidechains on the alpha carbons are shown. Now the sidechain elements are identified:
The sidechains on the alpha carbons are shown. Now the sidechain elements are identified:
Now the sidechain elements are identified: