when vitamin k-dependent 14c labelling of precursors of vitamin k-dependent proteins was carried out , fluorography of these precursors , when electrophoresed into sds/polyacrylamide gels , revealed 14c-labelled proteins of apparent molecular mass 74 , 46 , 42 , 34 , 31 and 23 kda .
C0033665
precursors
C0033684
proteins