Shared Flashcard Set

Details

Biochemistry of the Eye Test 1
Proteins 1
9
Chemistry
Professional
09/23/2007

Additional Chemistry Flashcards

 


 

Cards

Term
How many amino acids are commonly found in proteins?
Definition
20
Term
Amino acids are linked together by what type of bond?
Definition
Peptide bond
Term
Each amino acid (except proline) has what three parts? Which part defines the protein?
Definition
Carboxyl group
Amino group
R-group - This defines the protein
Term
Regarding amino acids, at physiological pH the ______ group is dissociated forming a ______ charge and the _____ group is protonated forming a ______ charge.
Definition
Carboxyl
negative
amino
positive
Term
What are the 9 amino acids with nonpolar side chains?
Definition
Isoleucine
Leucine
Alanine
Glycine
Tryptophan
Methionine
Valine
Proline
Phenylalanine
Term
What is so special about glycine, proline, and methionine?
Definition
Glycine has the smallest R-group (just one proton). It is good for tight conformations
Proline has a cyclical R-group. It is very disruptive to repetitive structures.
Methionine can disulfide bond. Important in cataract formation
Term
Do the amino acids with nonpolar side chains promote hydrophobic or hydrophilic interactions?
Definition
Hydrophobic
Term
Are the electrons in an amino acid with nonpolar side chains evenly or disruptively distributed?
Definition
Evenly
Term
Do nonpolar amino acids prefer to cluster in the interior of a protein? When located in a hydrophobic enviornment, where are the nonpolar amino acids located?
Definition
YES - They fill up the protein and provide the 3D shape

They are located on the protein surface
Supporting users have an ad free experience!