PMID:37403782 various U6 snRNP related

[ValWood]

• [x] decreased U6-2'-O-snRNA methylation at residue A64
• [x] abolished U6-2'-O-snRNA methylation at residue A64
• [x] Increased intron retention
• [x] abnormal snRNP (U6) assembly

[ValWood]

intron-specific abnormal mRNA splicing, via spliceosome might be identical to Increased intron retention but I created a child for now

[ValWood]

also added 'abnormal snRNA modification' as a grouping term