# When hemoglobin takes up oxygen there is a change in the structure due to the moving closer together of

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When hemoglobin takes up oxygen there is a change in the structure due to the moving closer together of

(A) β-chains

(B) β-chains

(C) γ-chains

(D) α and γ chains

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When hemoglobin takes up oxygen there is a change in the structure due to the moving closer together of β-chains.