HK1 is an enzyme.
HK1 or HK-1 may also refer to:
- HK-1, the original designation of the aircraft Hughes H-4 Hercules
- Heinonen HK-1, a Finnish sport aircraft
- Kimura HK-1, a Japanese experimental aircraft
- (127934) 2003 HK1, a minor planet
This disambiguation page lists articles associated with the same title formed as a letter–number combination.
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