Presence d'enzymes marqueurs des membranes plasmiques, de l'appareil de golgi et du reticulum endoplasmique dans les membranes des globules lipidiques de lait maternel

Abstract

We report here the presence in human milk fat globules membranes of 5′-nucleotidase, Na⁺-K⁺ and Mg²⁺ ATPases, and phosphodiesterase which are marker enzymes for the plasma membrane. Thiamine-pyrophosphatase, lactose and lactosamine synthetase were also found, which are usually considered as Golgi apparatus marker enzymes. Lastly, glucose-6-phosphatase, NADH-cytochromec reductase and RNase, characteristic enzymes of the endoplasmic membrane, were also present.