1a) Biliverdin is a pigment produced by tree frogs that causes them to look green - its structure in its fully ionized form is shown below. It contains two ionizable groups, both of which are carboxyl groups; one has a pK₂ of 3.9 and the other has a pK₂ of 5.3. What would the net charge on the whole molecule be if you dissolved it in an aqueous solution at pH 7.0? Briefly explain how you determined the charge. H3C H₂C H₂C COO COO CH3 H3C H₂C

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Chapter1: Biochemistry: An Evolving Science
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1a) Biliverdin is a pigment produced by tree frogs that causes them to look green - its structure in
its fully ionized form is shown below. It contains two ionizable groups, both of which are
carboxyl groups; one has a pK₁ of 3.9 and the other has a pK₂ of 5.3. What would the net charge
on the whole molecule be if you dissolved it in an aqueous solution at pH 7.0? Briefly explain
how you determined the charge.
a
H3C
H₂C
H3C
COO COO
çoo
S5 CH3 H3C
ZI
H₂C
IZ
O
roup has a chce
Transcribed Image Text:1a) Biliverdin is a pigment produced by tree frogs that causes them to look green - its structure in its fully ionized form is shown below. It contains two ionizable groups, both of which are carboxyl groups; one has a pK₁ of 3.9 and the other has a pK₂ of 5.3. What would the net charge on the whole molecule be if you dissolved it in an aqueous solution at pH 7.0? Briefly explain how you determined the charge. a H3C H₂C H3C COO COO çoo S5 CH3 H3C ZI H₂C IZ O roup has a chce
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