The completed sequence of a human genome, alongside increasingly those of model organisms, in rank of use and tractability, lays before the investigator the raw matter of inherited biology in stark and exquisite reductionist detail. At the dawn of our millennium, this newly arrived state of knowledge—omniscience, with respect to sequence—set into place the concatenation of new questions and bracing opportunities deemed the “postgenomic” era. What genes serve what functions, when, where, and how? (Even the most optimistic among us dispenses with “why?”) At a higher level of complexity, what networks of genes serve what functions, and how are these coordinated? How, too, do proteins relate, not just pairwise but in intricate webs of physical associations, counting in the thousands or many tens of thousands? In other words, broad-band biology. For the cardiovascular sciences, long-separate strands of work converged in recent years, in …