From: rokimoto557@gmail.com   
      
   https://phys.org/news/2025-12-discovery-intron-rich-eukaryotic-genome.html   
      
   https://academic.oup.com/dnaresearch/advance-article/doi/10.1093   
   dnares/dsaf035/8348290   
      
   This organism is touted as a eukaryote with the most intron rich genome.   
     It's nuclear genome is 214 million base pairs with 17,500 protein   
   genes, but introns in those genes account for 74% of the genomic   
   sequence.  It's coding sequence is packed with noncoding exons.  They   
   claim that these are spliceosomal introns and not self splicing   
   transposable parasitic introns.  So this lineage went nuts in when it   
   came to introducing introns into coding sequence.  For humans more than   
   half of the 3 billion base-pair genome is made up of repetitive sequence   
   or transposable elements that can still be identified as being   
   transposons.  Most of the rest is likely old transposon sequence that   
   has degenerated past recognition.  Less than 2% of the human genome is   
   coding sequence (exons) and introns within those genes account for   
   around 25% of the genome.  Introns can be composed of a lot of different   
   sequence origins like basically random sequence, transposons or   
   pseudogene insertions.  There are even other coding genes contained   
   within some of the larger introns.  My guess is that this critter's   
   introns are just as complex.   
      
   Amoebiformis has 4 genomes (1 nuclear and 3 organellar genomes).  One of   
   it's organellar genomes is derived from a eukaryotic algae and the other   
   two are of bacterial origin.  For some reason it is transferring   
   mitochondrial sequence to it's nuclear genome, but has not done that for   
   the plastid genomes.   
      
   This is a strange little beasty.   
      
   Ron Okimoto   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)