Amino Acids with Positively Charged Amines are shown in the figure below.
Using the three letter code of the amino acids to identify them, A is
and has a pKa of
, B is
and has a pKa of
, C is
and has a pKa of
The side chain of Arginine contains a
cation. It has a
system of pi molecular orbitals. Each of the four atoms (NNNC) contributes
one p -
The side chain of Lysine is a simple primary
cation at
neutral pH. With four carbons it is the longest linear
chain among the amino acids. The conformation of the lowest free energy is
all
as shown.
Amino Acids with Positively Charged Amines are shown in the figure below.
Using the three letter code of the amino acids to identify them, A is
and has a pKa of
B is
and has a pKa of
C is
and has a pKa of
The side chain of Arginine contains a
cation. It has a
system of molecular orbitals. Each of the four atoms (NNNC) contributes
one p
The side chain of Lysine is a simple primary
cation at
neutral pH. With four carbons it is the longest linear
chain among the amino acids. The conformation of the lowest free energy is
all
as shown.