The creatures in the game will still drop loot once you've defeated them, and all the creature loot will now have to be grinded down into a new part called Alien Protein, which...

Boy howdy, doesn't that just look tasty, huh?

This part will replace other alien loot in some research and crafting, such as the inhaler.

From alien protein, you'll also be able to create these DNA capsules, which will be used for science research and some additional unspecified purposes in the future.