Ribonucleoproteins

thumb|Telomerase catalytic subunit TERT of [[Tribolium castaneum (Red flour beetle), bound to putative RNA template and telomeric DNA (PDB 3KYL)]] thumb|A conceptual diagram showing the protein component of telomerase (TERT) in grey and the RNA component (TR) in yellow

eukaryotic organelle with 39-fold symmetry

macromolecular complex containing both protein and RNA molecules.

class of enzymes

Heterogeneous nuclear ribonucleoprotein U is a protein that in humans is encoded by the HNRNPU gene.