How do I get Immune Protein in Z Route: Redemption?

The game lists these sources: First Kill Reward, Uranium Crystal Refinery and S1: Legend Returns.

Which building gives Immune Protein?

Uranium Crystal Refinery: Produces [Immune Protein].

Immune Protein 10,000, which gives 10,000 Immune Protein.

Immune Protein in Z Route: Redemption comes from 3 sources in the game data (world map, building and recruit). 2 bag items hold it.

Season resource: the sources below are season content and may change between seasons.

SourceTypeHow

First Kill RewardWorld mapDefeat [Radiated Elite] for the first time to earn multiple resources!

Uranium Crystal RefineryBuildingProduces [Immune Protein].

S1: Legend ReturnsRecruitRecruit through [Mythic Returns] for a chance to obtain

Using these items adds the amount shown. Chests marked “Depends on Base level” scale with your Base, so the game data has no fixed amount for them.

ItemGives

Immune Protein 1,0001,000 Immune Protein

Immune Protein 10,00010,000 Immune Protein

How do I get Immune Protein in Z Route: Redemption?: The game lists these sources: First Kill Reward, Uranium Crystal Refinery and S1: Legend Returns.
Which building gives Immune Protein?: Uranium Crystal Refinery: Produces [Immune Protein].
What is the biggest Immune Protein item?: Immune Protein 10,000, which gives 10,000 Immune Protein.