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 Yvain , also known as Ywain, Owain, Uwain(e), Ewaine, etc., is a knight of the Round Table in Arthurian legend, wherein he is often the son of King Urien of Gorre and the sorceress Morgan le Fay.
Ywam Liberty is the former L'Astrolabe, a French icebreaking research vessel used for bringing personnel and supplies to the Dumont d'Urville research station in Antarctica.
14-3-3 protein epsilon is a protein that in humans is encoded by the YWHAE gene.
Yws Gwynedd is a Welsh rock band from North Wales named after its lead singer Ywain Gwynedd.
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.