Simplify the following text for a Grade 7 native English-speaking person.
Original: He shared a Nobel Prize in Physiology or Medicine in 1968 with Har Gobind Khorana and Robert W. Holley for `` breaking the genetic code '' and describing how it operates in protein synthesis .
Simplified: He won the 1968 Nobel Prize in Physiology or Medicine , along with Robert W. Holley and H. Gobind Khorana , for work on the genetic code and protein synthesis