{"id":31153,"date":"2022-08-19T21:07:23","date_gmt":"2022-08-19T19:07:23","guid":{"rendered":"https:\/\/karmaka.de\/?p=31153"},"modified":"2022-08-19T21:07:24","modified_gmt":"2022-08-19T19:07:24","slug":"geoelectrochemistry-driven-alteration-of-amino-acids-to-derivative-organics-in-carbonaceous-chondrite-parent-bodies","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=31153","title":{"rendered":"Geoelectrochemistry-driven alteration of amino acids to derivative organics in carbonaceous chondrite parent bodies<span class=\"badge-status\" style=\"background:#787878\">OPEN ACCESS<\/span>&nbsp;"},"content":{"rendered":"\n<p>Yamei Li, Norio Kitadai, Yasuhito Sekine, Hiroyuki Kurokawa, Yuko Nakano &amp; Kristin Johnson-Finn<\/p>\n\n\n\n<p>Nature Communications, Volume 13, Article number: 4893<\/p>\n\n\n\n<p><a href=\"https:\/\/www.nature.com\/articles\/s41467-022-32596-3\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>LINK (OPEN ACCESS)<\/strong><\/a><br><a href=\"https:\/\/www.nature.com\/articles\/s41467-022-32596-3.pdf\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>PDF (OPEN ACCESS)<\/strong><\/a><\/p>\n\n\n\n<p class=\"justify-text\">&#8220;A long-standing question regarding carbonaceous chondrites (CCs) is how the CCs\u2019 organics were sourced and converted before and after the accretion of their parent bodies. Growing evidence shows that amino acid abundances in CCs decrease with an elongated aqueous alteration. However, the underlying chemical processes are unclear. If CCs\u2019 parent bodies were water-rock differentiated, pH and redox gradients can drive electrochemical reactions by using H2 as an electron source. Here, we simulate such redox conditions and demonstrate that \u03b1-amino acids are electrochemically altered to monoamines and \u03b1-hydroxy acids on FeS and NiS catalysts at 25\u2009\u00b0C. This conversion is consistent with their enrichment compared to amino acid analogs in heavily altered CCs. Our results thus suggest that H2 can be an important driver for organic evolution in water-rock differentiated CC parent bodies as well as the Solar System icy bodies that might possess similar pH and redox gradients.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Yamei Li, Norio Kitadai, Yasuhito Sekine, Hiroyuki Kurokawa, Yuko Nakano &amp; Kristin Johnson-Finn Nature Communications, Volume 13, Article number: 4893 LINK (OPEN ACCESS)PDF (OPEN ACCESS) &#8220;A long-standing question regarding carbonaceous chondrites (CCs) is how the&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[152,9,576,127],"tags":[1865,3273,3275,1989,839],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/31153"}],"collection":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=31153"}],"version-history":[{"count":1,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/31153\/revisions"}],"predecessor-version":[{"id":31154,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/31153\/revisions\/31154"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=31153"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=31153"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=31153"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}