2A75 Trypanosoma rangeli Sialidase In Complex With 2,3- Difluorosialic Acid (Covalent Intermediate) Trypanosoma rangeli 2AH2 Trypanosoma cruzi trans-sialidase in complex with 2,3-difluorosialic acid (covalent intermediate) Trypanosoma cruzi 2FHR Trypanosoma Rangeli Sialidase In Complex With 2,3- Difluorosialic Acid (Covalent Intermediate) Trypanosoma rangeli 2VK7 THE STRUCTURE OF CLOSTRIDIUM PERFRINGENS NANI SIALIDASE AND ITS CATALYTIC INTERMEDIATES CLOSTRIDIUM PERFRINGENS 4H52 Wild-type influenza N2 neuraminidase covalent complex with 3-fluoro-Neu5Ac Influenza A virus 4NC5 Human sialidase 2 in complex with 2,3-difluorosialic acid (covalent intermediate) Homo sapiens (human) 4WEF Structure of the Hemagglutinin-neuraminidase from Human parainfluenza virus type III: complex with difluorosialic acid Human parainfluenza virus 3 4WEG influenza virus neuraminidase N9 in complex 2,3-difluorosialic acid Influenza A virus (A/tern/Australia/G70C/1975(H11N9)) 5F9T Crystal Structure of Streptococcus pneumoniae NanC, covalent complex with a fluorinated Neu5Ac derivative Streptococcus pneumoniae serotype 4 (strain ATCC BAA-334 / TIGR4)