We report here the presence in human milk fat globules membranes of 5'-nucleotidase, Na(+)-K(+) and Mg(2+) 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-cytochrome c reductase and RNase, characteristic enzymes of the endoplasmic membrane, were also present.
Martel-Pradal
M B.
MB
Equipe de Recherche, CNRS No 66, U.E.R. Lyon-Sud, BP 12, 69-, Oullins, France
Got
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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.