B. 卵磷脂(流动性较高)与鞘磷脂(流动性较低)比例增加会提高整体膜流动性,故此错误。 C. 在相变温度以下(膜处于有序状态),胆固醇插入可减少脂肪酸链的紧密排列,但反而会通过刚性环结构限制分子运动,降低流动性。 D. 在相变温度以上(膜处于无序状态),胆固醇通过限制脂肪酸链的横向运动降低流动性,但该选项描述与标准结论...
Fluidity of cellular membranes is essential for life. Two possibilities are known to keep human membranes fluid: unsaturated fatty acids and cholesterol. Whereas liver cells can synthesize cholesterol, unsaturated fatty acids are essential. Life style in Western civilization leads to deprivation of ...
Membrane Fluidity: About the Origin of AutoimmunityMembrane Fluidity: About the Origin of AutoimmunityMembrane FluidityAutoimmunityEssential Fatty AcidsCholesterolProtein ConformationFluidity of cellular membranes is essential for life. Two possibilities are known to keep human membranes fluid: unsaturated fatty ...
TCTGAA TG primers. The expression of the following tomato genes was analyzed using amplicons obtained with the sense and reverse sense primer pairs (5′ to 3′): 180 bp ofβ-actin(TC178617) GGAAAAGCTTGCCTATGTGG/CCTGCAGCTTCCATACC AAT, 66 bp ofHsfA2(CAA47870) ACCTTGTGGATCAGCTTGGT...
The heat stress is known to severely affect the membrane fluidity, which causes malfunctioning of intracellular organelles (chloroplast and mitochondria) due to increased cytosolic calcium and reactive oxygen species (ROS)11. The increased ROS seldomly leads to over-reduction of electron transport chain...
The structure of a lipid bilayer is determined by the properties of its lipid molecules. Suppose the phospholipids have only one hydrocarbon chain instead of two. How would this affect membrane fluidity?...
In the present study, the type of P-CPA itself did not significantly affect in vitro sperm quality parameters and a clear concentration dependent effect of the CPAs on the in vitro quality of frozen/thawed chicken semen was found. The progressive increase of the P-CPA concentration from 2% ...
Changes in fatty acid methyl ester (FAME) profiles in the presence of metals for maintaining membrane fluidity have also been reported [101]. Cytotoxicity is directly dependent on the NM concentration to which the microorganisms are exposed [95]. Fig. 4 shows that, regardless of the type of ...
As membrane cholesterol plays an integral role in the binding and regulation of many transmembrane proteins62, we asked if and how cholesterol enrichment on graphene substrates could affect transmembrane proteins and the signaling pathways they mediate. Using the same approach that was used for our ne...
In general, tumor metastasis incorporates the following processes. First, before the formation of metastases, primary tumors or CTCs induce PMNs that provide support for the growth and colonization of tumor cells in distant organs. Second, CTCs undergo changes such as EMT to increase invasiveness and...