MOESM1 of Mammalian prion protein (PrP) forms conformationally different amyloid intracellular aggregates in bacteria MacedoBruno Sant’AnnaRicardo NavarroSusanna CordeiroYraima VenturaSalvador 2015 Additional file 1. In the Supplemental Material Section the Amide I region of the ATRFTIR spectrum of purified native recombinant PrP23–231 is shown, along with the corresponding spectral bands assigned to different secondary structure components.