Mention at least three species of HPV(Human papinovirus)

Shope papilloma virus, mastomys natalensis papillomavirus, and psittacus erithacus timneh papillomavirus

enzyme active site and substrate specificity

enzymes bind with chemical reactants called substrates. there may be one or more substrates for each type of enzyme, depending on the particular chemical reaction. in some reactions, a single-reactant substrate is broken down into multiple products