Antiparallel

The term antiparallel may refer to:

Antiparallel (biochemistry), the orientation of adjacent molecules
Antiparallel (mathematics), the placement of parallel lines in relation to an angle
Antiparallel (electronics), the polarity of devices run in parallel

In biochemistry two molecules are antiparallel if they run side-by-side in opposite directions In Geometry, anti-parallel lines can be defined with respect to either lines or angles In electronics two antiparallel or inverse-parallel devices are connected in parallel but with their polarities reversed

Dictionary

-adjective

(mathematics) of vectors, parallel but of opposite direction
(biochemistry) describing the orientations of the two strands of DNA
(biochemistry) describing two beta strands comprising a protein's secondary structure that are aligned and hydrogen bonded but the vector describing the amino- and carboxy-terminal ends of each strand are oriented 180° relative to one another.

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