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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.
If an internal link led you here, you may wish to change the link to point directly to the intended article.

HK1 (disambiguation)