|
In haemoglobin, which amino acid acts as blood buffer? |
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|
a) |
Histidine |
b) |
Glutamine |
c) |
Aspartic |
d) |
Lysine |
|
In haemoglobin, which amino acid acts as blood buffer? |
|||||||
|
a) |
Histidine |
b) |
Glutamine |
c) |
Aspartic |
d) |
Lysine |
(c)
In haemoglobin, aspartic acid acts as blood buffer. It is a dicarboxylic amino acid. The carboxylic group of the side chain dissociates at physiological pH to give the negatively charged side chain.