{"id":95581,"date":"2025-12-02T19:31:11","date_gmt":"2025-12-02T19:31:11","guid":{"rendered":"https:\/\/www.europesays.com\/se\/95581\/"},"modified":"2025-12-02T19:31:11","modified_gmt":"2025-12-02T19:31:11","slug":"nya-marina-svampdjur-ger-ledtradar-om-djurens-evolution","status":"publish","type":"post","link":"https:\/\/www.europesays.com\/se\/95581\/","title":{"rendered":"Nya marina svampdjur ger ledtr\u00e5dar om djurens evolution"},"content":{"rendered":"<p>Svampdjur kan ha funnits 100 miljoner \u00e5r tidigare \u00e4n vad man trott<\/p>\n<p class=\"uu-text\">Forskarna uppt\u00e4ckte ocks\u00e5 att vilesider producerar en mycket ovanlig typ av steroler som huvudkomponenter i sina celler. Steroler \u00e4r en viktig del av cellmembranen, d\u00e4r de p\u00e5verkar membranens fluiditet. I st\u00e4llet f\u00f6r att anv\u00e4nda kolesterol, som m\u00e4nniskor och m\u00e5nga andra djur, domineras deras sterolprofil av s\u00e5 kallade 24-isopropylkolesteroler (24-ipc-steroler) \u2013 steroler som i stora m\u00e4ngder hittills bara hittats i just dessa svampar.<\/p>\n<p class=\"uu-text\">\u2212 Denna uppt\u00e4ckt \u00e4r s\u00e4rskilt viktig eftersom dessa unika steroler matchar exakt de fossiliserade steroider som tros utg\u00f6ra de \u00e4ldsta k\u00e4nda djurbiomark\u00f6rerna, som hittats i stora m\u00e4ngder i ediacariska bergarter som \u00e4r \u00e4ldre \u00e4n 600 miljoner \u00e5r. V\u00e5ra fynd ger d\u00e4rmed ytterligare st\u00f6d \u00e5t den s\u00e5 kallade svampbiomark\u00f6rhypotesen som f\u00f6resl\u00e5r att svampar \u2013 och d\u00e4rmed djur \u2013 uppstod omkring 100 miljoner \u00e5r tidigare \u00e4n vad man tidigare trott, s\u00e4ger Paco C\u00e1rdenas som lett studien.<\/p>\n<p class=\"uu-text\">Denna hypotes st\u00f6ds \u00e4ven en nyligen publicerad artikel i PNAS d\u00e4r tre av f\u00f6rfattarna till den aktuella studien visar att ovanliga steroler i mycket gamla bergarter med stor sannolikhet kommer fr\u00e5n tidiga svampdjur.<\/p>\n","protected":false},"excerpt":{"rendered":"Svampdjur kan ha funnits 100 miljoner \u00e5r tidigare \u00e4n vad man trott Forskarna uppt\u00e4ckte ocks\u00e5 att vilesider producerar&hellip;\n","protected":false},"author":2,"featured_media":95582,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[66],"tags":[80,78,79,34,31,33,32,30,81,84,83,82],"class_list":{"0":"post-95581","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-vetenskap-och-teknik","8":"tag-science","9":"tag-science-and-technology","10":"tag-scienceandtechnology","11":"tag-se","12":"tag-svenska","13":"tag-sverige","14":"tag-sweden","15":"tag-swedish","16":"tag-technology","17":"tag-teknik","18":"tag-vetenskap","19":"tag-vetenskapteknik"},"share_on_mastodon":{"url":"https:\/\/pubeurope.com\/@se\/115651640238121650","error":""},"_links":{"self":[{"href":"https:\/\/www.europesays.com\/se\/wp-json\/wp\/v2\/posts\/95581","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.europesays.com\/se\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.europesays.com\/se\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/se\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/se\/wp-json\/wp\/v2\/comments?post=95581"}],"version-history":[{"count":0,"href":"https:\/\/www.europesays.com\/se\/wp-json\/wp\/v2\/posts\/95581\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/se\/wp-json\/wp\/v2\/media\/95582"}],"wp:attachment":[{"href":"https:\/\/www.europesays.com\/se\/wp-json\/wp\/v2\/media?parent=95581"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.europesays.com\/se\/wp-json\/wp\/v2\/categories?post=95581"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.europesays.com\/se\/wp-json\/wp\/v2\/tags?post=95581"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}