As shown in the figure, beta2 H146 has a positive charge. How many H-bond donors
ID: 146866 • Letter: A
Question
As shown in the figure, beta2 H146 has a positive charge. How many H-bond donors are available on this residue? Explain why.
A. 0
B. 1
C. 2
D. 3
Zoom showing a highly schematic drawing of the key interactions that are broken going the T- and R-state crystal structures. Here the B-globins (blue) are transparent so that interactions at the -globin (pink) N-termini can be visualized a, K40 R141 2 D94 R141 , K40 4D94 a2 K127 2 K127 B2 H146 interactions a2 V1 Key interactions are formed at the B-termini in the T state. Key interactions are formed at the -termini in the T state. Key interactions at the B-termini are disrupted in the R state. Key interactions at the -termini are disrupted in the R state Copyright 2019, 2016 Pearson Education, Inc.Explanation / Answer
Answer ) 3 hydrogen donar are pressnt in Beta2 H146.
Because, there is one positive charge and 2 carbon atom attached with hydrogen, when high Electronegative atom binds to either positive charge or carbon atom, carbon atom will tend to donate its hydrogen to high EN Atom attached to it, and hence acts as a Hydrogen donar.
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