Calcium transport by bull spermatozoa plasma membranes
โ Scribed by H. Breitbart; S. Rubinstein
- Book ID
- 115726001
- Publisher
- Elsevier Science
- Year
- 1983
- Tongue
- English
- Weight
- 459 KB
- Volume
- 732
- Category
- Article
- ISSN
- 0005-2736
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Calcium transport has been studied using purified endomembrane vesicles from dark-grown roots of Pisum sativum L. Membranes from a mixed microsomal (non-mitochondrial) fraction showed ATP-dependent calcium uptake which was released by the ionophore A 23187, had a pH optimum of 7.2 and required Mg(2+
Calcium transport by purified endomembrane vesicles from roots of Pisum sativum L. was studied. Two types of ATP-depcndent transport were demonstrated, protonophore-sensitive calcium/proton antiport and protonophore-insensitive transport. The former was predominantly located in the tonoplast, while
We have studied the mechanisms involved in calcium (Ca2+) transport through the basal plasma membranes (BPM) of the syncytiotrophoblast cells from full-term human placenta. These purified membranes were enriched 25-fold in Na+/ K+-adenosine triphosphatase (ATPase), 37-fold in [3H]dihydroalprenoloI b