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The side chain of Asp 94 on the b chain of hemoglobin is in close proximity...

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Biology

The side chain of Asp 94 on the bchain of hemoglobin is in close proximity to the imidazole ring ofHis 146 on the b chain in the deoxy form of hemoglobin but not theoxy form.

1. What kind of interaction occursbetween Asp 94 and His 146 in the deoxy form of hemoglobin?

2. Is the imidazole ring of Hisprotonated or unprotonated? Explain.

3. The proximity of Asp 94 alters thepK value of the imidazole ring of His. In what way?

Answer & Explanation Solved by verified expert
4.4 Ratings (918 Votes)
1 Haemoglobin exists in the T tense and R relaxed state The T form is the quaternary structure of deoxyhaemoglobin while the R state is the structure of oxyhaemoglobin The side chain of the Cterminal His 146 residue of each beta subunit interacts with Asp 94 residue of the same chain to    See Answer
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