You’ve lost it.
Cech won the Nobel Prize for this.
Here’s one of many.
The intervening sequence excised from the ribosomal RNA precursor of Tetrahymena contains a 5-terminal guanosine residue not encoded by the DNA.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC320658/
You know how to use PubMed, don’t you?
Cech-TR tetrahymena rRNA
https://www.ncbi.nlm.nih.gov/pubmed/?term=Cech-tr+tetrahymena+rrna
>>Cech won the Nobel Prize for this.
LOL. And Obama won the Nobel Prize for... whatever.
In the meantime - you’ve repeatedly iFAILED to provide the evidence required to demonstrate iCOMPLETE self-replication necessary to support the process of evolutionary abiogenesis.
“From 2 Q of Tetrahymena, 0.5 ig (3.7 pmoles) of
pure IVS RNA was routinely isolated.”
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC320658/pdf/nar00378-0064.pdf
So, IOW, that RNA was obtained from living Tetrahymena - not synthesized from atomic precursors.