🧬 DNA Duplex Builder: B-Helix Geometry and Nearest-Neighbour Melting Temperature

Type a base sequence and build its B-DNA double helix from real geometry (0.34 nm rise, 10.5 bp per turn), then heat it: a nearest-neighbour thermodynamic model gives the melting temperature and shows the pairs opening from the weak AT-rich ends.

3D · Three.js / WebGL renderer · 60 FPS target · runs fully client-side, no install