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Which outcome destabilizes a protein when environmental pH shifts?

A)Disrupted inter-subunit salt bridges
B)Increased hydrophobic core packing
C)Enhanced disulfide bond stability
D)Formation of novel peptide bonds

💡 Explanation

Protein structure is sensitive to pH; shifting environmental pH leads to altered protonation states of amino acid side chains. This affects ionic bonding *Electrostatic interactions*, because protonation changes alter charge distributions, and therefore salt bridges weaken, rather than strengthening, due to altered electrostatic forces.

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