The λmax of s157c at ph 4.5 is greater than at ph 10. how does the proposed bonding of deprotonated c157 with y63 at ph 10 account for this observation? a. compared to hydrogen bonding at ph 4.5, ionic bonding at ph 10 destabilizes the sgbp chromoprotein barrel conformation. b. compared to hydrogen bonding at ph 4.5, ionic bonding at ph 10 decreases the maximum normalized absorbance. c. compared to hydrogen bonding at ph 4.5, ionic bonding at ph 10 promotes peak absorbance of higher energy radiation. d. compared to hydrogen bonding at ph 4.5, ionic bonding at ph 10 increases the wavelength of maximum absorption.