Pr and Pfr structures of plant phytochrome A.

Nat Commun · 2025 · PMC12182589 · PMID 40544164

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might be significantno p-value reported

This angle might be significant since it primes the D-ring for isomerisation yet maintains π-electron coupling: the latter falls rapidly beyond 50° according to the cos2 dependency in Hückel molecular orbital theory.

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