Nonenzymatic Protein Function and Protein Analysis

Question 1

Structural proteins?

Answer 1

generally fibrous

• collagen
• elastin
• keratin
• actin
• tubulin

Question 2

Motor proteins?

Answer 2

capable of force generation through conformational change

• myosin
• kinesin
• dynein

Question 3

Binding proteins?

Answer 3

bind a specific substrate, either to sequester it in the body or hold its concentration at steady state

Question 4

Cell adhesion molecules (CAMs)?

Answer 4

bind cells to other cells or surfaces

• cadherins
• integrins
• selectins

Question 5

Antibodies (immunoglobulins, Ig)?

Answer 5

target a specific antigen, which may be a protein on the surface of a pathogen (invading organism) or a toxin