YW may refer to:
14-3-3 protein zeta/delta (14-3-3ζ) is a protein that in humans is encoded by the YWHAZ gene on chromosome 8. The protein encoded by this gene is a member of the 14-3-3 protein family and a central hub protein for many signal transduction pathways.
Sir Ywain /ᵻˈweɪn/, also called Owain, Yvain, Ewain or Uwain, is a Knight of the Round Table and the son of King Urien and Morgan le Fay in Arthurian legend.
14-3-3 protein epsilon is a protein that in humans is encoded by the YWHAE gene.
14-3-3 protein theta is a protein that in humans is encoded by the YWHAQ gene.
14-3-3 protein beta/alpha is a protein that in humans is encoded by the YWHAB gene.
14-3-3 protein eta is a protein that in humans is encoded by the YWHAH gene.
14-3-3 protein gamma is a protein that in humans is encoded by the YWHAG gene.