. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. EVOLUTION: A MOLECULAR POINT OF VIEW 313 o r=\ II N^ ,N-P- 2. H?N N * (pN)2-(pN)15 _ O ImpN HO OH N=A,G, pH =8, 25°C, ~4 days 2',5' and 3',5,-phospho- diester bonds and pyrophosphate links Linear and cyclic oligomers formed. CH3 (CH3)2N-/l£- 4-dimethylaminopyridine \=J 2-methylimidazole CH3 1-methyladenine Figure 4. (1) Reaction of the phosphorimidazolides of nucleosides on rnontmorillonite. (2) Phosphate activating groups with the site of binding to the phosphate indicated. formation of the compleme
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. EVOLUTION: A MOLECULAR POINT OF VIEW 313 o r=\ II N^ ,N-P- 2. H?N N * (pN)2-(pN)15 _ O ImpN HO OH N=A,G, pH =8, 25°C, ~4 days 2',5' and 3',5,-phospho- diester bonds and pyrophosphate links Linear and cyclic oligomers formed. CH3 (CH3)2N-/l£- 4-dimethylaminopyridine \=J 2-methylimidazole CH3 1-methyladenine Figure 4. (1) Reaction of the phosphorimidazolides of nucleosides on rnontmorillonite. (2) Phosphate activating groups with the site of binding to the phosphate indicated. formation of the complementary oligo(G)s. These oligo(C)s contain mainly 2'.5'-links along with 3',5'- and pyrophos- phates bonds (7); in addition, both straight-chain and cyclic oligomers are present as products. The complementary oli- go(G)s were formed when the heterogeneous template was treated with 5'-GMP activated by 2-methylimidazole (Fig. 4. line 2). Both 2',5'- and 3'.5-linked oligo(G)'s were formed in this template-directed synthesis. Even when all the 3',5'-links were removed from the oligo(C)s, a template that directed the synthesis of the complementary oligo(G)s still resulted. Thus, the information content of the hetero- geneous oligomers formed by mineral catalysis or by other prebiotic routes could have been maintained by template- directed + ImpA Decamer 32 pdA(pdA)8p—j Q A. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory
Size: 2219px × 1126px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
