Complex sentence: Telomerase is a ribonucleoprotein polymerase that maintains telomere ends by addition of the telomere repeat TTAGGG, this repeat does vary across eukaryotes (see the table on the telomere article for a complete list).
Split into simpler sentences: Telomerase is a ribonucleoprotein polymerase that maintains telomere ends by addition of the telomere repeat TTAGGG. This repeat does vary across eukaryotes (see the table on the telomere article for a complete list).