Hemoglobin is an iron-containing protein found in the blood of nearly all vertebrates and many invertebrates. It transports oxygen from the lungs or gills of an animal to the tissues. Four polypeptide chains, each wrapped in a specific way around its own heme group, make up the hemoglobin molecule.
Correction Appended. Alger Hiss, the erudite diplomat and Harvard-trained government lawyer who was convicted of perjury in an espionage case that became one of the great riddles of the Cold War, died yesterday at Lenox Hill Hospital in New York City. He was 92 and lived in Manhattan.
Lehrer on Watergate: It was a crime of corruption. John Dean on the days following the Watergate break-in. A burglary at a Washington office complex called the Watergate in June 1972 grew into a wide-ranging political scandal that culminated in the resignation of President Richard Nixon two years later.