Amino acid identification of Bombyx mori fibroin cocoon as biomaterial using liquid chromatography/mass spectrometrySartika Puspita, Siti Sunarintyas, Chairil Anwar, Ema Mulyawati and Marsetyawan HNE SoesatyoBIO Web Conf., 28 (2020) 02001DOI: https://doi.org/10.1051/bioconf/20202802001