Results 121 to 130 of about 3,830 (170)
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Retinyl Esters Are the Substrate for Isomerohydrolase
Biochemistry, 2003Regeneration of 11-cis retinal from all-trans retinol in the retinal pigment epithelium (RPE) is a critical step in the visual cycle. The enzyme(s) involved in this isomerization process has not been identified and both all-trans retinol and all-trans retinyl esters have been proposed as the substrate.
Gennadiy, Moiseyev +5 more
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Retinyl esters in the vertebrate neuroretina
American Journal of Physiology-Regulatory, Integrative and Comparative Physiology, 1989High-performance liquid chromatography (HPLC) was employed to measure retinyl esters in the vertebrate retina. Both retina and retinal pigment epithelium (RPE) from frog, chicken, and bovine eyes were studied. In comparison to the RPE, the retina possessed a significant level of 11-cis and all trans retinyl palmitate.
K A, Rodriguez, A T, Tsin
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Nonaqueous electrochromatography on C30 columns: Separation of retinyl esters
Electrophoresis, 1999A nonaqueous packed capillary electrochromatographic reversed-phase method for separation of retinyl esters has been developed. The retinyl esters all-trans-retinyl acetate, palmitate, heptadecanoate, stearate, oleoate, and linoleoate were separated on a 180 microm ID column packed with 5 microm C30 particles with a mobile phase consisting of 2.5 mM ...
Elsa Lundanes
exaly +3 more sources
Retinyl and 3-dehydroretinyl esters in the crayfish retina
Vision Research, 1988We have studied chemical nature and localization of retinyl esters stored in the retina of the crayfish, Procambarus clarkii, which has a rhodopsin-porphyropsin visual pigment system. The crayfish kept at 10 degrees C in the constant dark had 3-dehydroretinal along with retinal in the retina as the chromophore of visual pigment.
Yasuaki Maeda +2 more
exaly +3 more sources
Retinol and retinyl esters in rabbit bone marrow and blood leukocytes
Scandinavian Journal of Clinical and Laboratory Investigation, 1993Due to the well documented effects of retinoids on growth and differentiation of some leukaemic cells in vivo and in vitro, we measured the amount of retinol and retinyl esters in bone marrow, blood leukocytes, and liver in rabbits fed large doses of retinyl palmitate.
Rune Blomhoff, K R Norum
exaly +5 more sources
Hydrolysis of Retinyl Esters by Pancreatic Triglyceride Lipase
Biochemistry, 2000Previously [van Bennekum, A. M., et al. (1999) Biochemistry 38, 4150-4156] we showed that carboxyl ester lipase (CEL)-deficient (CELKO) mice have normal levels of pancreatic, bile salt-dependent retinyl ester hydrolase (REH) activity. In the present study, we further investigated this non-CEL REH activity in pancreas homogenates of CELKO and wild-type (
A M, van Bennekum +3 more
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In Vitro transfer of chylomicron retinol and retinyl esters
Biochemical and Biophysical Research Communications, 1983The redistribution of rat chylomicron retinoids following incubation with fasting- or postheparin human plasma was investigated. With fasting plasma, chylomicron retinol appeared among higher density lipoprotein acceptors and density greater than 1.21 gm/ml plasma proteins; only small amounts of retinyl ester were found therein. With postheparin plasma,
D E, Wilson, I F, Chan
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Retinyl ester hydrolysis in the rabbit lacrimal gland
Current Eye Research, 1992The lacrimal gland stores retinyl esters which are synthesized by the enzyme acyl CoA:retinyl acyl transferase. Retinol is released from retinyl ester reserves by retinyl ester hydrolase (REH). Since the lacrimal gland secretes retinol, this gland should also contain this enzyme. To identify bile salt-dependent REH activity, rabbit lacrimal glands were
D L, Bernal, J L, Ubels
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