1.   But molecular geneticists now look back on such triumphs, shake their heads and say, boy, did those lucky devils have it easy.

2.   Dr. Lee Silver, a mouse molecular geneticist at Princeton University, said the speed and the implications of the work were stunning.

3.   Heading the research along with German were molecular geneticists Nathan A. Ellis, of the blood center, and Joanna Groden of the University of Cincinnati College of Medicine.

4.   On a walk through the Harvard Medical School campus four years ago, Perls described his centenarian families to Kunkel, the molecular geneticist.

5.   So would Dr. Dean Hamer, a molecular geneticist at the National Institutes of Health who studies the genetic basis of human behavior.

6.   Two years ago, however, several teams of molecular geneticists developed what they called a genetic clock to calculate the estimated rate of evolutionary change in animal life.