Y4
(Redirected from Y4 (disambiguation))
Y4 may refer to:
- Pancreatic polypeptide receptor 1, a protein that in humans is encoded by the PPYR1 gene
- a Mazda diesel engine
- IATA airline designator for Volaris
- LNER Class Y4, a class of British steam
This disambiguation page lists articles associated with the same title formed as a letter–number combination.
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