Immunoblotting of the 170-kD myosin fraction (a)
and spinach CaM (b). The concentrations of 170-kD myosin and CaM
applied on SDS-PAGE for each assay were 0.9 and 0.2 μg, respectively.
A, Coomassie brilliant blue staining of a 15% polyacrylamide gel. B,
Immunoblotting using antiserum against spinach CaM. C, Immunoblotting
using antiserum against the 170-kD heavy chain. The arrow indicates the
position of the 170-kD heavy chain. Arrowheads 1 and 2 indicate the 34-
and the 18-kD polypeptide, respectively. The
Mrs (×10−3) of standard
proteins are indicated on the left.