[Localization of cholinesterases in structures of the alveolar portion of the mammary gland].

Cholinesterase (ChE) localization in the alveolar compartment of the mammary gland has been studied by light microscopy and ultrahistochemical methods. The product of reaction to ChE is associated with micropinocytotic vesicles of the capillar endothelium and myoepithelial cells, separate nerve terminals in interalveolar connective tissue and perivascular nerve terminals. In secretory cells, the ChE activity is revealed in the sites of fat droplet and on the membranes of endoplasmatic reticulum.