So, I'm designing a race of sapient extraterrestrials for a series of short stories, and I've gotten to the point of designing their basic biochemistry, but I have a problem: Both their environment And (as I found out with How to replace glucose with ethanol?) their basic metabolic processes are highly acidic. Therefore, I must ask: How can I make Earthlike biochemistry more acid-tolerant?
- Amino acids (and proteins constructed from them) should be used, although if different amino acids must be used this is fine
- The primary solvent must still be water, although it will have a lot of CO2 dissolved in it
- Oxygen-based respiration should still be possible
The local atmosphere is as follows:
- Pressure: 1.19atm
- Composition: 78% N2, 17% O2, 2.2% CO2, 2.2% Ar, 0.5% H2O, 0.06% CH4, 0.03% NH3, 0.01% other
As mentioned in (what is a the time of writing this) the top answer to the question linked above, the local metabolic processes, in order to work the way I intend, must produce a lot of acidic compounds as intermediaries and byproducts, so take that into account when calculating acidity levels.