Protein Structure from Scientific Research

b) As no stabilizing H-bonding is present in SzTYR, which features an isoleucine (Ile42, cyan) instead of an asparagine in the homologous position, the hydroxy group of 2A4MP (grey) is oriented towards the dicopper center in SzTYR, which provides a structural explanation for the different reactivities of SgGriF and SzTYR.

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