Amino acid side chain high affinity for Ca²⁺ and Cu²⁺ in metallo-proteins is: · ABC26IN0293
Subject: Inorganic Chemistry · Chapter: Bioinorganic Chemistry · Topic: Bioinorganic – General · Exam: GATE 2005-2021 · Marks: 2 · Difficulty: Easy
Amino acid side chain high affinity for $\mathrm{Ca}^{2+}$ and $\mathrm{Cu}^{2+}$ in metallo-proteins is:
(a)carboxylate in both the cases.
(b)imidazole in both the cases.
(c)caboxylate for $\mathrm{Ca}^{2+}$ and imidazole for $\mathrm{Cu}^{2+}$.
(d)imidazole for $\mathrm{Ca}^{2+}$.
Answer
Answer: C ✓ checked by 4AB · confidence high
Explanation
Hard Ca²⁺ binds carboxylates (Asp/Glu); borderline-soft Cu²⁺ binds histidine imidazole (c).
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