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- Serine_octamer_cluster abstract "The Serine octamer cluster in physical chemistry is an unusually stable cluster consisting of eight serine molecules (Ser) implicated in the origin of homochirality. This cluster was first discovered in mass spectrometry experiments. Electrospray ionization of an aerosol of serine in methanol results in a mass spectrum with a prominent ion peak of 841 corresponding to the Ser8+H+ cation. The smaller and larger clusters are virtually absent in the spectrum and therefore the number 8 is called a magic number. The same octamer ions are also produced by rapid evaporation of a serine solution on a hot (200-250 °C) metal surface or by sublimation of solid serine. After production, detection again is by mass-spectroscopic means. For the discussion of homochirality, these laboratory production methods are designed to mimic prebiotic conditions.The cluster is not only unusually stable but also unusual because the clusters have a strong homochiral preference. A racemic serine solution produces a minimum amount of cluster and with solutions of both enantiomers a maximum amount is formed of both homochiral D-Ser8 and L-Ser8. In another experiment cluster formation of a racemic mixture with deuterium enriched L-serine results in a product distribution with hardly any 50/50 D/L clusters but a preference for either D or L enantioenriched clusters.A model for chiral amplification is proposed whereby enantioenriched clusters are formed from a non-racemic mixture already enriched by L-serine as a result of a mirror-symmetry breaking process. Cluster formation is followed by isolation and on subsequent dissociation of the cluster a serene solution forms with a higher concentration of L-serine than in the original mixture. A cycle can be maintained in which each turn results in an incremental enrichment in L-serine. Many such cycles eventually result in enantiopure L-serine. This model has been experimentally verified.Chiral transmission is assumed to take place through so-called substitution reactions of serine clusters. In these reactions, a serine monomer in a cluster can be replaced by another small biologically relevant molecule. For instance Ser8 reacts with glucose (Glc) to the Ser6 + Glc3 + Na+ cluster. Moreover the cluster of synthetic L-glucose with Ser8 is less abundant than that with the biological D-glucose.".
- Serine_octamer_cluster wikiPageID "3938313".
- Serine_octamer_cluster wikiPageLength "3476".
- Serine_octamer_cluster wikiPageOutDegree "26".
- Serine_octamer_cluster wikiPageRevisionID "634218711".
- Serine_octamer_cluster wikiPageWikiLink Abiogenesis.
- Serine_octamer_cluster wikiPageWikiLink Aerosol.
- Serine_octamer_cluster wikiPageWikiLink Category:Physical_chemistry.
- Serine_octamer_cluster wikiPageWikiLink Category:Stereochemistry.
- Serine_octamer_cluster wikiPageWikiLink Deuterium.
- Serine_octamer_cluster wikiPageWikiLink Electrospray_ionization.
- Serine_octamer_cluster wikiPageWikiLink Enantiomer.
- Serine_octamer_cluster wikiPageWikiLink Evaporation.
- Serine_octamer_cluster wikiPageWikiLink Glucose.
- Serine_octamer_cluster wikiPageWikiLink Homochirality.
- Serine_octamer_cluster wikiPageWikiLink Ion.
- Serine_octamer_cluster wikiPageWikiLink Magic_angle_spinning.
- Serine_octamer_cluster wikiPageWikiLink Magic_number_(chemistry).
- Serine_octamer_cluster wikiPageWikiLink Mass_spectrometry.
- Serine_octamer_cluster wikiPageWikiLink Methane_clathrate.
- Serine_octamer_cluster wikiPageWikiLink Methanol.
- Serine_octamer_cluster wikiPageWikiLink Molecule.
- Serine_octamer_cluster wikiPageWikiLink Physical_chemistry.
- Serine_octamer_cluster wikiPageWikiLink Racemic_mixture.
- Serine_octamer_cluster wikiPageWikiLink Serine.
- Serine_octamer_cluster wikiPageWikiLink Sublimation_(phase_transition).
- Serine_octamer_cluster wikiPageWikiLink Superatom.
- Serine_octamer_cluster wikiPageWikiLinkText "Serine octamer cluster".
- Serine_octamer_cluster wikiPageUsesTemplate Template:Reflist.
- Serine_octamer_cluster subject Category:Physical_chemistry.
- Serine_octamer_cluster subject Category:Stereochemistry.
- Serine_octamer_cluster comment "The Serine octamer cluster in physical chemistry is an unusually stable cluster consisting of eight serine molecules (Ser) implicated in the origin of homochirality. This cluster was first discovered in mass spectrometry experiments. Electrospray ionization of an aerosol of serine in methanol results in a mass spectrum with a prominent ion peak of 841 corresponding to the Ser8+H+ cation.".
- Serine_octamer_cluster label "Serine octamer cluster".
- Serine_octamer_cluster sameAs Q7454848.
- Serine_octamer_cluster sameAs m.0b7q10.
- Serine_octamer_cluster sameAs Q7454848.
- Serine_octamer_cluster wasDerivedFrom Serine_octamer_cluster?oldid=634218711.
- Serine_octamer_cluster isPrimaryTopicOf Serine_octamer_cluster.