antiparallel Tweet Definition of antiparallel Like Definition of antiparallel on Facebook
  1. (mathematics) of vectors, parallel but of opposite direction
  2. (biochemistry) describing the orientations of the two strands of DNA
  3. (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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