#Question id: 141
#Unit 1. Structure and Function of Biomolecules
At the isoelectric pH of an amino acid which has two pKa values the net charge is
#Question id: 142
#Unit 1. Structure and Function of Biomolecules
Histidine has pKa values of 1.8, 6.0 (R-group) and 9.3 . At pH 8.0, the net charge on histidine is
#Question id: 143
#Unit 1. Structure and Function of Biomolecules
Which amino acid is ideal for the transfer of protons within the catalytic site of enzymes due to the presence of significant amounts of both the protonated and deprotonated forms of its side chain at biological pH?
#Question id: 144
#Unit 1. Structure and Function of Biomolecules
The pKaʹs of arginineʹs α-Carboxyl group, α-Amino group and side chain are 1.8, 9.0 and 12.5, respectively. Calculate the isoelectric point.
#Question id: 145
#Unit 1. Structure and Function of Biomolecules
The pKaʹs of isoleucineʹs α-Carboxyl group and α-Amino group are 2.3 and 9.8, respectively. Calculate the isoelectric point.
#Question id: 146
#Unit 1. Structure and Function of Biomolecules
The pH inside cells is normally near pH 7. At pH 7 which statement is true about the charges (ionization state) of the α-Carboxyl and α-Amino groups of an amino acid?