Prime Medicine looks unusually inexpensive relative to its platform at a roughly $570 million market cap. Bristol Myers Squibb's deal includes over $3.5 billion of potential milestones, six times that value, plus royalties, and gives Prime a route into cancer and immunology; their value depends on success, timing and costs. Prime editing can make all 12 single-letter DNA substitutions and insert or delete DNA, and its first CGD patients reached 69% and 83% functional neutrophils by day 30. x.comÂ