This model (one complete turn of the double helix) is designed for self-assembly. The model may be assembled on the stand for display, or laid flat for a demonstration of unzipping and replication. It is also possible to combine this DNA model with an RNA model (SRNA12) to explain transcription and protein synthesis.

- Includes colour-coded bases (G,C,A and T), deoxyribose and phosphate groups, as well as a display stand
- On sturdy base 
- Size: Approx 44cm high x 11cm diameter.