Input (grade 13): He and others subsequently showed that the cyclins bind and activate a family of protein kinases, now called the cyclin-dependent kinases, one of which had been identified as a crucial cell cycle regulator by Paul Nurse.
Output (grade 10): His group showed that cyclins bind and activate a family of protein kinases, now called the cyclin-dependent kinases. One of these had been identified as a crucial cell cycle regulator by Paul Nurse.