Ekspresi dan karakterisasi peptida bakteriosin rekombinan Bac3 dari bacillus subtilis DB403 asal weissella confusa MBF8-1 menggunakan elektroforesis = Expression and characterization of Bac3 recombinant bacteriocin peptide from bacillus subtilis DB403 originated from weissella confusa MBF8-1 by electrophoresis