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Natesh, R and Manikandan, K and Bhanumoorthy, P and Viswamitra, MA and Ramakumar, S (2003) Thermostable xylanase from Thermoascus aurantiacus at ultrahigh resolution (0.89 Å) at 100 K and atomic resolution (1.11 Å) at 293 K refined anisotropically to small-molecule accuracy. In: Acta Crystallographica Section D: Biological Crystallography, 59 (Part 1). pp. 105-117.
Natesh, R and Bhanumoorthy, P and Vithayathil, PJ and Sekar, K and Ramakumar, S and Viswamitra, MA (1999) Crystal structure at $1.8 \AA$ resolution and proposed amino acid sequence of a thermostable xylanase from Thermoascus aurantiacus. In: Journal of Molecular Biology, 288 (5). pp. 999-1012.