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Xenonucleic acids (XNAs) (see also Wikipedia) may be what you're looking for. XNAs are nucleic acids related to DNA, some of which can store information for organisms in the same way that DNA does...
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#1: Attribution notice removed
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System
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2020-06-01T14:13:48Z (over 4 years ago)
Source: https://worldbuilding.stackexchange.com/a/36225 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/