[asdff]

Once you have that initial polymerization, thats it, game over, now you can template right off that.

https://pmc.ncbi.nlm.nih.gov/articles/PMC7496532/

[pfdietz]

Again, implausible purity there. I'll add the tetramers used as the components are also much larger than the nucleotides in the Ryugu paper, so would be present in much lower concentrations.