2015. PHYSICAL OPTIMIZATION OF THERMOSTABLE ALKALINE PROTEASE BY E. COLI BL21 (DE3) PLYSS HARBORING 50A PROTEASE GENE USING RESPONSE SURFACE METHODOLOGY. Jurnal Teknologi (Sciences & Engineering). 78, 1 (Dec. 2015). DOI:https://doi.org/10.11113/jt.v78.4048.