منابع مشابه
Erythrocyte Membrane Cation Permeability
A B S T R A C T Cetiedil has been reported to relieve painful crises in sickle cell anemia and to have antisickling properties in vitro. The drug alters neither oxygen affinity nor the solubility of deoxyhemoglobin S. Because the viscosity of the erythrocyte interior and the kinetics ofgelation are dependent on the concentration of hemoglobin, we postulated that cetiedil might inhibit sickling ...
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Many protozoans and some other organisms possess contractile vacuoles (CVs), membranous organelles which help maintain cellular water/ electrolyte balance by extracting a dilute solution from the cytoplasmic colloid and expelling it from the cell (35, 37). Although the similarity of CV function in the various organisms has long been recognized, the expected similarity of morphological elements ...
متن کاملAlterations in outer membrane permeability.
INTRODucnON ... ......... ........... .. . .. ........ ... ........ . .. .. ... .. ... . ......... .. ........ . 238 Structure oj the Cell Envelope.................................................................. 238 Uptake Arross the Outer Membrane.......................................................... 239 Intrinsic,Dejects in Outer Membrane Permeability in So.me Bacteria . .... ..... .. ....
متن کاملNexal membrane permeability to anions
The permeability of the septa of the earthworm in the median axon has been calculated for the anions fluorescein and its halogen derivatives. The values ranged from 5.4 X 10(-5) to 4 X 10(-6) cm/s. Previously, the septa had been shown to contain nexuses. By using freeze-fracture material, the surface area of nexus on the septal membranes was determined to be 4.5%, very similar to the percentage...
متن کاملHigh membrane permeability for melatonin
The pineal gland, an endocrine organ in the brain, synthesizes and secretes the circulating night hormone melatonin throughout the night. The literature states that this hormone is secreted by simple diffusion across the pinealocyte plasma membrane, but a direct quantitative measurement of membrane permeability has not been made. Experiments were designed to compare the cell membrane permeabili...
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ژورنال
عنوان ژورنال: Biophysical Journal
سال: 1972
ISSN: 0006-3495
DOI: 10.1016/s0006-3495(72)86093-4