Design a guide RNA, scan a target gene for on-target and off-target sites, watch Cas9 cut, and explore NHEJ knockout vs HDR knock-in repair outcomes in an interactive CRISPR-Cas9 molecular model.

Biology

Goodwin Oscillator — Circadian Gene Clock

A three-gene negative-feedback loop drives the 24-hour clock. Tune the Hill coefficient n — below the threshold n≈8 the oscillation dies, showing why circadian clocks need cooperative gene regulation.

Biology

Waddington's Epigenetic Landscape — Cell Fate Decision

Conceptual Waddington landscape: cells drift from a pluripotent summit into lineage-biased valleys in a potential-like field inspired by gene regulation and epigenetic stabilization.

Biology

STDP Synapse

Interactive Spike-Timing-Dependent Plasticity (STDP) visualization — explore how precise spike timing shapes synaptic weights, the neural basis of learning and memory

Biology

Basilar Membrane Traveling Wave

Interactive visualization of cochlear traveling waves: explore frequency-position mapping on the basilar membrane, tonotopic organization, and the active amplification mechanism

Biology

Protein Folding Energy Funnel

Click the funnel to place intermediate states, observe how mutations alter energy barriers and folding kinetics

Biology

Quorum Sensing

Interactive visualization of bacterial quorum sensing: Hill equation, autoinducer dynamics, phase transition, and cooperative gene activation

Biology

Hemoglobin-Oxygen Binding Curve

Interactive sigmoidal O2 dissociation curve: Hill equation, P50, Bohr effect, cooperativity, and allosteric regulation of hemoglobin

Biology

Photosynthesis

Interactive visualization of photosynthesis: light reactions, Calvin cycle, and energy flow

Biology

Darwin's Finch Beak Evolution Simulator

Interactive simulation of natural selection driving beak evolution in Darwin's finches under environmental pressure

Biology

DNA Replication & Transcription — Central Dogma Animation

Interactive step-by-step DNA replication and transcription animation: from double helix unwinding to mRNA transcript

Biology

Action Potential Propagation

Explore threshold firing, sodium-potassium channel timing, refractory periods, and myelin-accelerated axon conduction in an interactive action potential propagation model.