Names
What is the one letter code for isoleucine?
I
Which amino acid (one letter code) has a side chain that is a methyl group?
A
Is leucine polar or non polar?
non polar
What is the pKa of histidine?
6
Which amino acid is not chiral?
glycine
What is the three letter code for glutamic acid?
Glu
What is the name of one amino acid that contains an amide group?
asparagine or glutamine
Is methionine polar?
no
What are the two possible charge states of a glutamic acid side chain?
neutral and negative
Which amino acids (one letter code) absorb light at 280nm (hint: they are also aromatic).
W, Y
What is the three letter code for tryptophan?
Trp
Which two amino acids contain a sulfur?
M, C
Which two amino acids have positively charged side chains at all physiological pHs?
K,R
What charge do basic amino acids have a physiological pH?
positive
Which amino acid side chain attaches to the peptide/protein backbone?
P
What is the one letter code for lysine?
K
Which three amino acids contain an -OH group?
T,S,Y
Which amino acids are negatively charged at physiological pH?
D, E
Name two amino acids have pKas above 10?
Y, K, R
Two cysteine side chains (2 x S-H) can form a disulfide bond (S-S). Which form of cysteine is in the reduced state? The S-H form or the disulfide?
S-H
What is the one letter code for glutamine?
Q
Which two amino acids are isomers?
I, L
Which of these would definitely want to be buried in the interior of a protein?
V,Q,T,R,F
V,F
Which two amino acids have pKas around 4?
D, E
Which letters in the alphabet are not one-letter codes for amino acids?
B,J,O,U,X,Z