claim: Backing vocalists provide instrumental harmony.
evidence: Cyclin D is a member of the cyclin protein family that is involved in regulating cell cycle progression .. cyclin. cyclin. cell cycle. cell cycle. The synthesis of cyclin D is initiated during G1 and drives the G1 / S phase transition .. cyclin. cyclin. G1 / S phase transition. G1 / S transition. Cyclin D protein is anywhere from 155 -LRB- in zebra mussel -RRB- to 477 -LRB- in Drosophila -RRB- amino acids in length .. zebra mussel. zebra mussel. Drosophila. Drosophila