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(kil′ŏ-dolt″ŏn) [ kilo- + dalton],

kD, kDa

A unit of molecular mass consisting of 1000 daltons.
Medical Dictionary, © 2009 Farlex and Partners


One thousand daltons. A dalton is the weight of a hydrogen atom. The kilodalton is the standard unit used to represent the weight of large molecules such as proteins. It is normally abbreviated to K or Kd.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

kilodalton (K, kDa, kdal, kDal)

a unit of mass equal to 1000 DALTONS.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005