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is the pka of a histidine side chain always the same as that of the free...

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Question

Chemistry

is the pka of a histidine side chain always the same as that ofthe free amino acid? Why?

how do titration curves differ between non ionizable andionizable r groups? why?

Biochemistry

Answer & Explanation Solved by verified expert
4.3 Ratings (536 Votes)
hiACharge of the amino acid side chainsCharged side chainsWhen an amino acid AA isincorporated into a polypeptide the charges on the amino andcarboxyl groups disappear Among the 20 common amino acids fivehave a side chain which can be charged At pH7 two are negativecharged aspartic acid Asp D andglutamic acid Glu E acidicside chains and three are positive chargedlysine Lys K arginine ArgR and histidine His H basicside chainsThe    See Answer
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