Hell yeah...I've reverse engineered it...oh yeah I've made gold too, and silver, and diamonds--just reverse engineered them. They are just complex compounds right and scientists should just be able to reproduce in a laboratory environment.
What makes my blood cells and DNA unique? Enzymes are living organisms right? Easy enough to reproduce right.... do a little reading about how "easy" it is to produce enzymes and make products out of them.
Under structure and mechanisms I quote "However, although structure does determine function, predicting a novel enzyme's activity just from its structure is a very difficult problem that has not yet been solved.[17]"