Home >
Community >
What is the net charge of cysteine in pH 9 and 12 from its constituents pKas?
Upvote
11
Downvote
+ Physical chemistry
+ Cysteine
+ Biochemistry
+ Chemistry
+ Organic chemistry
Posted by
Loren McCune
What is the net charge of cysteine in pH 9 and 12 from its constituents pKas?
What is the net charge of cysteine in pH 9 and 12 from its constituents' pKas?
I think the easiest way to approach this question (for any amino acid or in fact, any polyprotic substance) is to start by considering the fully protonated form of the substance that would exist at a pH well below the first pKa, say, pH = 0.
For cysteine, that would be carboxy group protonated (neutral), amino group protonated (+1) and side chain protonated (neutral), so an overall charge of +1.
What is the net charge of cysteine in pH 9 and 12 from its constituents' pKas?
I think the easiest way to approach this question (for any amino acid or in fact, any polyprotic substance) is to start by considering the fully protonated form of the substance that would exist at a pH well below the first pKa, say, pH = 0.
For cysteine, that would be carboxy group protonated (neutral), amino group protonated (+1) and side chain protonated (neutral), so an overall charge of +1.
What is the net charge of cysteine in pH 9 and 12 from its constituents' pKas?
I think the easiest way to approach this question (for any amino acid or in fact, any polyprotic substance) is to start by considering the fully protonated form of the substance that would exist at a pH well below the first pKa, say, pH = 0.
For cysteine, that would be carboxy group protonated (neutral), amino group protonated (+1) and side chain protonated (neutral), so an overall charge of +1.
What is the net charge of cysteine in pH 9 and 12 from its constituents' pKas?
I think the easiest way to approach this question (for any amino acid or in fact, any polyprotic substance) is to start by considering the fully protonated form of the substance that would exist at a pH well below the first pKa, say, pH = 0.
For cysteine, that would be carboxy group protonated (neutral), amino group protonated (+1) and side chain protonated (neutral), so an overall charge of +1.
More
VOTE