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antiparallel

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antiparallel /an·ti·par·al·lel/ (-par´ah-lel) denoting molecules arranged side by side but in opposite directions.
antiparallel
[-per′ələl]
Etymology: Gk, anti + parallelos, side-by-side
pertaining to molecules, such as strands of DNA, that are parallel but are oriented in opposite directions.


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The hydrogen bonds are between antiparallel chains in the [alpha] form and between the parallel chains in the [gamma] form.
However, antiparallel [beta]-sheets have also been found by solid state NMR in fibrils formed by shorter [beta]-amyloid fragment.
7a indicates that CtCVNH structure is quite similar to that of native CV-N, including the positions of triple-stranded antiparallel [beta]-sheet (the first sequence repeat: [beta]1, [beta]2, and [beta]3; the second: [beta]6, [beta]7, and [beta]8), [beta]-hairpin (formed by [beta]4 and [beta]5, [beta]9 and [beta]10, respectively), and [alpha]-helical turn ([micro]1-4).
 
 
 
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