MCD spectra of amino acid complexes of [Co(NH3)5(OCOCHRNH3)]3+, [Co(NH2CHRCO2)(NH3)4]2+, and [Co(NH2CHRCO2)(en)2]2+ types have been measured. The complexes belonging to a given type show nearly identical MCD curves irrespective of variation in their natural CD patterns. The complexes of d-, l-, and Dl-alanine show identical MCD spectra.