Sequences and Consequences↗

One Letter

One misplaced letter — a T where there should be an A — bends a round red cell into a sickle. It took seventy-five years to undo.

The Guardian We Mistook for the Enemy

The “guardian of the genome” was first mistaken for the enemy. It is the most commonly mutated gene in human cancer.

The Salt and the Gate

A child whose skin tasted of salt was once a death sentence. The story of a broken gate in the cell membrane — and the drugs that reopen it.

The Lizard's Receptor

A hormone first glimpsed in the venom of a desert lizard became the most talked-about medicine of the decade.

The cartoon that builds you

Named after a video-game hedgehog, this gene draws the body plan — telling an embryo its left from its right.

The flaw that saves your life

A rare mutation gives a few people astonishingly low cholesterol. Borrowing it became a twice-a-year shot.

The Stutter

A short stretch of DNA, stuttered hundreds of times over — the most common genetic cause of ALS and frontotemporal dementia.

The Undruggable Switch

The most frequently mutated oncogene in human cancer — and for nearly forty years the best chemists alive called it “undruggable.”

The Protein That Left

A single protein abandons the nucleus — and in over nine in ten people with ALS, toxic clumps of it fill dying motor neurons.

The Drug That Was Wrong Twice

A 1960s sleeping pill caused thousands of catastrophic birth defects — then, fifty years on, the protein it secretly hijacks turned it into one of oncology's most important drugs.

More Than Skin Deep

The gene that turns hair red also turns a dial on pain — redheads, on average, need more anesthesia, and it traces to a single receptor.

The Longest Read

The largest gene in your body takes sixteen hours to read — and its sheer size is what makes Duchenne the most common fatal muscle disease of childhood.