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Question: please answer both questions thanks...

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Please answer both questions, thanks!
(12). Histones, which bind to the backbone of DNA through noncovalent bonds, are rich in lysines. If you replaced the lysines with glutamate in histones, what would be effect on histone-DNA binding? Why? (1 point) (13). The following are the pKas for the ionizable groups of histidine: (0.5 point) Carboxyl: 1.82 Amino: 9.17 R-group: 6.0 Draw the chemical structure of histidine at a pH of 7
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