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Sequence alignment of phiYFPv and the yellow variants of the YFP group (total identity 44.2%) showing the chromophore-forming sequence (highlighted in grey), residues from the environment nearest to the chromophore (in red; see also Fig. 3 ▶) and dimer-stabilizing residues from the intersubunit contact surface (highlighted in yellow; see also Table 1 ▶).
