retraction ring - RPET
- ribonucleotide reductase
- ribophorin
- ribophorins
- ribopyranose
- ribose
- ribose 5-phosphate
- ribose nucleoprotein
- ribose-5-phosphate
- ribose-5-phosphate isomerase
- ribose-phosphate pyrophosphokinase
- riboside
- Ribosomal RNA
- Ribosome
- ribosuria
- ribosyl
- ribosylation
- ribosylpurine
- ribosylthymidine
- Ribot's law
- Ribot's law