Chapter 14. Proteins. Proteins. Proteins serve many functions, including the following. Given are examples of each. Structure: collagen and keratin are the chief constituents of skin, bone, hair, and nails
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1. All 20 are -amino acids (10 are essential)
2. For 19 of the 20, the -amino group is primary; for proline, it is secondary
3. With the exception of glycine, the a-carbon of each is a stereocenter
4. Isoleucine and threonine contain a second stereocenter
the pH at which the majority of molecules of a compound in solution have no net charge
Fig 21.4, p.533
Pink = O, Blue = N
Fig 21.7, p.538
Fig 21.8, p.538
or hair straightening.
Hair = protein
Fig 21.UN, p.547