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Experimental study reveals enhanced deep-membrane reporting by a novel C24 probe in lipid bilayers, highlighting its utility for tracking fatty acid dynamics in necroptosis.
To investigate the interdigitation and the resulting fluctuation of lipid chains in the deep part of biomembranes, we aimed to develop a new fluorescent probe based on the well-known trans-parinaric acid (t-PA), but with a tetraene near the end of the C24 chain. The probe, tetracosa-16,18,20,22-tetraenoic acid (TCTEA), synthesized mainly by means of reported strategies, was found to better reflect the behavior of lipids in the deeper interior of bilayers than did t-PA. TCTEA could serve as a useful probe for studying the plasma-membrane dynamics of very-long-chain fatty acids, which have recently elicited significant attention in relation to necroptosis.
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Umegawa et al. (2023) studied this question.
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