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Facile Synthetic Routes to Prepare α-Muricholic Acid, Hyocholic Acid, and Their Taurine Conjugates
Kang, Dong Wook,Luecke, Hans F. Korean Chemical Society 2013 Bulletin of the Korean Chemical Society Vol.34 No.8
${\alpha}$-Muricholic acid was synthesized through 9 steps from chenodeoxycholic acid with 26% overall yield. Hyocholic acid was synthesized through 8 steps from the same starting material with 63% overall yield. Taurine conjugates of ${\alpha}$-muricholic acid and hyocholic acid were also prepared via their pentafluorophenyl ester.
Shen, Haihong,Zheng, Xuexiu,Luecke, Stephan,Green, Michael R Cold Spring Harbor Laboratory in association with 2010 Genes & development Vol.24 No.21
<P>The U2AF35-related protein Urp has been implicated previously in splicing of the major class of U2-type introns. Here we show that Urp is also required for splicing of the minor class of U12-type introns. Urp is recruited in an ATP-dependent fashion to the U12-type intron 3' splice site, where it promotes formation of spliceosomal complexes. Remarkably, Urp also contacts the 3' splice site of a U2-type intron, but in this case is specifically required for the second step of splicing. Thus, through recognition of a common splicing element, Urp facilitates distinct steps of U2- and U12-type intron splicing.</P>
Facile Synthetic Routes to Prepare α-Muricholic Acid, Hyocholic Acid, and Their Taurine Conjugates
강동욱,Hans F. Luecke 대한화학회 2013 Bulletin of the Korean Chemical Society Vol.34 No.8
α-Muricholic acid was synthesized through 9 steps from chenodeoxycholic acid with 26% overall yield. Hyocholic acid was synthesized through 8 steps from the same starting material with 63% overall yield. Taurine conjugates of α-muricholic acid and hyocholic acid were also prepared via their pentafluorophenyl ester.