AP1
Template:Sister project AP1 or AP-1 may refer to:
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Biology
- Activator protein 1, dimeric transcription factor
- Adaptor protein 1, tetrameric clathrin-associated complex
Transportation
- Autopista AP-1, a Spanish motorway
- Caproni A.P.1, a 1934 Italian attack aircraft monoplane
- USS Henderson (AP-1)
Other uses
- Protocol I, or AP 1, a 1977 amendment to the Geneva Conventions