Ultrastructural localization of calcium-binding sites in the electrocyte of Electrophorus electricus (L.).

Calcium-binding sites were detected in the electrocyte of Electrophorus electricus (L.) using the Oschman & Wall technique, in which CaCl2 was added to the fixative and washing solutions. Deposits were seen scattered along the plasma membrane of the electrocyte, inside mitochondria, associated with the post-synaptic membrane and the membrane of synaptic vesicles.