strands of the double helix are organized in opposite orientation, so that the 5Â' end of one strand is aligned with the 3Â' end of the other strand.

A term used to describe the opposite orientations of the two strands of a DNA double helix; the 5 end of one strand aligns with the 3 end of the other strand.

The opposite orientation of the two complementary strands of a DNA duplex. The opposite orientation of two beta strands to create a beta sheet.

Opposite orientation of the two strands of a DNA duplex, one runs in the 3' to 5' direction, the other in the 5' to 3' direction.