chapter 4: primary structure Flashcards
______ are the building
blocks of nature and can be arranged in enumerable ways.
proteins
All amino acids have a chiral center except glycine. The chiral center is on the a-carbon.
t/f
True
What form are amino acids usually in?
The L-form in nature (S configuration)
What are amino acids classified by?
its R group
What is maximum light absorbance of W and Y?
280 nm
*absorbance values can help us determine protein concentration values
How do disulfide bonds forms in AA?
the oxidation of two cysteines. disulfide bonds stabilizes the structures of many proteins.
Amino acid derivatives examples:
glycine, GABA, dopamine
histamines- mediator of allergic reaction, histamine blocker (benadryl)
thryoxine- thryoid hormone that regulates metabolism
compounds that can behave as either an acid or base are amphoteric and called ___
amphoylytes
When an amino acid lacking an ionizable “R” group is dissolved in water at neutral pH, it exists in solution as the dipolar ion called a
zwitterion
isolelectric point
the pH at which the net electric charge of an amino acid is zero
two or more amino acids covalently linked by peptide bonds
peptide bonds
made through a condensation reaction
amino acid sequence =
protein function
non amino acid chemical components of proteins, they usually play a very important role in the proteins functionality
prosthetic group
proteins that contain lipids
lipoproteins
proteins that contain sugars
glycoproteins
