Simplify the following text for a Grade 13 native English-speaking person.
Original: They can occur both naturally and artificially , examples being proteins , such as wool and silk , and can be made artificially through step-growth polymerization or solid-phase synthesis , examples being nylons , aramids , and sodium poly ( aspartate ) .
Simplified: Examples for artificially-made polyamides are nylons , aramids and Sodium poly ( aspartate ) .