Andrew Yates reviews Stewart Scherer's A Short Guide to the Human Genome. It's not, he says, a book for laypeople but for scientists with a grounding in molecular biology and interested in genomics. As such, the book expects you to add your own context, says Yates. It contains a fair few factoids including these that Yates posted: "How big is the largest protein? 33,423 amino acids (titin, which is encoded by the TTN gene). The smallest?