Simplify the following text for a Grade 11 native English-speaking person.
Original: A DNA construct may express wildtype protein , prevent the expression of certain genes by expressing competitors or inhibitors , or express mutant proteins , such as deletion mutations or missense mutations .
Simplified: A DNA construct may express wildtype protein , or prevent the expression of certain genes by expressing competitors or inhibitors . It may express mutant proteins , such as deletion mutations or missense mutations .