Niu, Dandan, Congying Li, Peng Wang, Lei Huang, Nokuthula Peace Mchunu, Suren Singh, Bernard A. Prior, and Xiuyun Ye. 2019. “Twin-Arginine Signal Peptide of Bacillus Licheniformis GlmU Efficiently Mediated Secretory Expression of Protein Glutaminase”. Electronic Journal of Biotechnology 42 (November). Valparaíso, Chile. https://preprints.pucv.cl/index.php/ejbiotechnology/article/view/2019.10.006.