On the other hand, the cyclic side chain of Pro (the only proteinogenic amino acid with a constrained phi angle) is too stiff to make a regular secondary structure and therefore intrin- sically reduces the ability to form hydrogen bonds. The conformational constraint imposed by the pres- ...
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Gels obtained through chemical interactions are generally resistant, as they are mainly formed by covalent bonds (primary forces), while gels resulting from physical interactions are less resistant, as they are maintained through different secondary forces, such as hydrogen bonds, hydrophobic interactions...
As the ELL–EAF subcomplex of the super elongation complex (SEC) and the PAF (PAF1 complex)–RTF1 complex also stimulate transcription elongation, we compared the structures of the Pol II–SPT6–Elongin complex with the Pol II–DSIF–ELL2–EAF1 and the Pol II–PAF–RTF1–SPT6 (EC*)...