Helicase(1) DNA interacting agents(1) O-acetyltransferase (Oac)(1) Chromogenic sialic acids(1) UvrD(1) neuraminidase(1) ATPase(1) Critical amino acids(1) Kinetic assay(1) DNA unwinding(1) Shigella flexneri(1) sialidase(1) malaria parasite(1) Streptococcus pneumoniae(1)