Sugar ring pucker: Difference between revisions
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==Conformations of ribose rings== | ==Conformations of ribose rings== | ||
The two most common conformations are C3' endo and C2' endo. For ribose, endo refers to the side of the glycosidic bond (i.e. the direction of the nucleobase in nucleosides). It is also the direction of the 5'-OH group, whereas the 2'-OH and the 3'-OH are on the exo side. The animation shows a morph between a <scene name='90/900784/Endo_exo/1'>C3'-endo and a C2'-endo</scene> conformation. Use the buttons to toggle groups attached to the ring. Note how the distance between the 5'-OH and 3'-OH groups (or that of the attached phosphates, if displayed) changes when the conformation changes. | The two most common conformations are C3' endo and C2' endo. For ribose, endo refers to the side of the glycosidic bond (i.e. the direction of the nucleobase in nucleosides). It is also the direction of the 5'-OH group, whereas the 2'-OH and the 3'-OH are on the exo side. The animation shows a morph between a <scene name='90/900784/Endo_exo/1'>C3'-endo and a C2'-endo</scene> conformation. Use the buttons to toggle groups attached to the ring. Note how the distance between the 5'-OH and 3'-OH groups (or that of the attached phosphates, if displayed) changes when the conformation changes. | ||
<jmol> | |||
<jmolCheckbox> | |||
<scriptWhenChecked>display displayed or (4 and base)</scriptWhenChecked> | |||
<scriptWhenUnchecked>hide not displayed and not (4 and base)</scriptWhenUnchecked> | |||
<checked>false</checked> | |||
<text>Nucleobase</text> | |||
</jmolCheckbox> | |||
</jmol> | |||
==B-DNA vs A-DNA== | ==B-DNA vs A-DNA== | ||