antiparallel

English

Etymology tree

Proto-Indo-European *h₂ent-

Proto-Indo-European *-s

Proto-Indo-European *h₂énts

Proto-Indo-European *-i

Proto-Indo-European *h₂énti

Ancient Greek ᾰ̓ντῐ́ (ăntĭ́)

Ancient Greek ἀντι- (anti-)der.

English anti-

English parallel

English antiparallel

antiparallel (not comparable)

(mathematics) (of vectors) Parallel but in opposite directions.
1. (biochemistry) Describing the orientations of the two strands of DNA.
  - 2015 October 16, “Polyanionic Carboxyethyl Peptide Nucleic Acids ( ce -PNAs): Synthesis and DNA Binding”, in PLOS ONE‎^[1], →DOI:
    Upon interaction with ss- nucleic acid (NA) targets (deoxyribooligonucleotides (ODNs) or ribooligonucleotides), they form very stable anti-parallel and parallel duplexes [3 ], and the melting temperatures of the antiparallel duplexes are 10 to 15°C higher than those of the parallel duplexes.
2. (biochemistry) Describing two beta strands comprising a protein's secondary structure that are aligned and hydrogen bonded but where the vectors describing the amino- and carboxy-terminal ends of each strand are oriented 180° relative to one another.

parallel of opposite direction

antiparallel (plural antiparallels)

(geometry) A line that forms equal angles with two other lines, but in opposite directions.

Friom anti- +‎ parallel.

antiparallel (strong nominative masculine singular antiparalleler, not comparable)

Positive forms of *antiparallel* (uncomparable)
number & gender		singular			plural
number & gender		masculine	feminine	neuter	plural
predicative		er ist antiparallel	sie ist antiparallel	es ist antiparallel	sie sind antiparallel
strong declension (without article)	nominative	antiparalleler	antiparallele	antiparalleles	antiparallele
	genitive	antiparallelen	antiparalleler	antiparallelen	antiparalleler
	dative	antiparallelem	antiparalleler	antiparallelem	antiparallelen
	accusative	antiparallelen	antiparallele	antiparalleles	antiparallele
weak declension (with definite article)	nominative	der antiparallele	die antiparallele	das antiparallele	die antiparallelen
	genitive	des antiparallelen	der antiparallelen	des antiparallelen	der antiparallelen
	dative	dem antiparallelen	der antiparallelen	dem antiparallelen	den antiparallelen
	accusative	den antiparallelen	die antiparallele	das antiparallele	die antiparallelen
mixed declension (with indefinite article)	nominative	ein antiparalleler	eine antiparallele	ein antiparalleles	(keine) antiparallelen
	genitive	eines antiparallelen	einer antiparallelen	eines antiparallelen	(keiner) antiparallelen
	dative	einem antiparallelen	einer antiparallelen	einem antiparallelen	(keinen) antiparallelen
	accusative	einen antiparallelen	eine antiparallele	ein antiparalleles	(keine) antiparallelen