1. Antibody (1igt) X X
Antibodies are part of the immune system. They bind to foreign molecules, like viruses
and bacteria.
2. Fibrinogen (1m1j) X X
When activated by thrombin, fibrinogen forms fibers in blood clots.
3. Serum Albumin (1e7i) XX
Serum albumin transports hydrophobic compounds like fatty acids.
4. Thrombinogen (1a0h + 2pf2) XX
When blood vessels are damaged, thrombinogen in converted to thrombin, which then
activates fibrinogen to form a blood clot.
5. Factor VII (1dan (chain L+H)) XX
Factor VII is a blood clotting factor that is part of the cascade of signals that lead to blood
clotting.
6. Insulin (4ins) X X
Insulin is a hormone that regulates the level of glucose in the blood.
7. Transferrin (1h76) XX
Transferrin transports iron atoms.
8. Alpha-1-antitrypsin (1hp7) XX
Antitrypsin is an inhibitor that blocks the action of trypsin.
9. Retinol-binding protein (1brp) XX
Retinol-binding protein transports hydrophobic molecules like retinol.
10. Fibronectin (2cku?) XX
Fibronectin is an adhesive protein that is involved in healing of wounds.
11. Perforin (2qp2) XX
Perforin is part of the complement system in the immune system. When activated, it
associates to form a hollow tube that makes a hole in bacterial surfaces.
12. Complement C1 (???) XX
Complement C1 binds to the surface of bacterial cells, activating the complement system
and ultimately activating perforin.
13. Low Density Lipoprotein XX
LDL transports fats and lipids.
14. High Density Lipoprotein XX
HDL transports fats and lipids.
‫ ﻵ‬15.
Other serum proteins
Many other serum proteins are found at low concentrations. They are involved in
transport, clotting, signaling, and the immune system.
16. Band 3 protein (???) XX
The most plentiful protein in the RBC cell membrane is Band 3 protein, which acts as an
anion exchanger, transporting bicarbonate ions and chloride ions.
17. Receptor protein (???) XX
Receptor proteins receive signals at the cell surface and transmit them inside.
18. Ion pumps (1s4u) XX
Several different types of ion pumps transport specific ions in and out of the cell.
19. Ion channel (1bl8) XX
Several different types of ion channels allow specific ions to cross the cell membrane.
20. Ankyrin (???) XX
Ankyrin links protein in the cell membrane to the cytoskeleton inside the cell.
21. Spectrin (???) XX
Spectrin forms a network that braces the cell membrane.
22. Actin (1o18) XX
Short pieces of actin are used in the simplified cytoskeleton of red blood cells.
‫ ﻵ‬23.
Actin-binding proteins
Several different actin-binding proteins control the size and location of actin filaments in
the cell.
24. Hemoglobin (2hhb) XX
Hemoglobin carries oxygen through the blood.
25. Catalase (8cat) XX
Catalase destroys dangerous hydrogen peroxide molecules.
26. Superoxide dismutase (2sod) XX
SOD destroys dangerous superoxide molecules.
27. NADH-cytochrome b5 reductase (1umk) XX
This enzyme converts methemoglobin, a form of hemoglobin with the iron atom in the
wrong charge state, into normal hemoglobin.
28. Glyceraldehyde-3-phosphate dehydrogenase (3gpd) XX
This enzyme performs one of the steps of glycolysis
29. Phosphoglycerate kinase (3pgk) XX
This enzyme performs one of the steps of glycolysis.