Felderer, K., Groves, M., Diez, J., Pohl, E., & Witt, S. (2008). Crystallization and preliminary X-ray analysis of the Thermoplasma acidophilum 20S proteasome in complex with protein substrates. Acta crystallographica. Section F, Structural biology and crystallization communications, 64(10), 899-902. https://doi.org/10.1107/s1744309108026791