antiparallel strand

an·ti·par·al·lel strand

a macromolecular strand that is oriented in the opposite direction of a neighboring strand.
References in periodicals archive ?
When the guanine tracts are oriented in opposite directions, the edgewise or diagonal loops link two antiparallel strands to form an antiparallel G-quadruplex [4].
This regularity along two long antiparallel strands leads to the famous, repeating "double helix" structure of DNA familiar to everyone.
The second a-sheet is composed of S5 (Arg161-Tyr163) and S6 (Glu167-Thr169) antiparallel strands. The last [beta]-sheet of the domain I is built by S8 (Glu222-Arg229) and S9 (Thr23 1-Ile237) antiparallel strands.