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The newly synthesized 11-cis-7-methylretinal can form an artificial visual pigment with kinetic and spectroscopic properties similar to the native pigment in the dark-state. However, its photobleaching behavior is altered, showing a Meta I-like photoproduct. This behavior reflects a steric constraint imposed by the 7-methyl group that affects the conformational change in the binding pocket as a result...
A series of poly(α-alkyl γ-glutamate)s (PAAG-n with n=1-10) were prepared from poly(γ-glutamic acid) (PGGA) of microbial origin by a two-steps synthesis procedure. The poly(α-ethyl γ-glutamate) was firstly obtained by esterification of PGGA and then transesterified with the selected alkanol to obtain the corresponding PAAG-n. The modification reactions were found to occur without alteration of the...
N-Acylphosphatidylserines have been isolated from intact and injured tissues, but the participation of such acidic phospholipids in membrane aggregation and fusion has not been demonstrated. We have synthesized N-stearoylphosphatidylserine (NSPS) and examined divalent-cation-induced aggregation of NSPS-liposomes, which leads to membrane destabilization and fusion. The purified lipid was characterized...
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