"Words coined in the 1880s" . . "DNA replication" . "Label-free luminescence switch-on detection of hepatitis C virus NS3 helicase activity using a G-quadruplex-selective probe" . "G-quadruplex" . "Hepaciviruses" . "EC 3.6.4" . "Luminescence" . "Viral nonstructural proteins" . "Hepatitis C virus" . "Light sources" . "DNA" .