hairpin


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hair·pin

( hār'pin),
1. The structure formed by a polynucleic acid by base-pairing between neighboring complementary sequences of a single strand of either DNA or RNA.
2. The structure seen in a prostaglandin where two segments of the molecule fold back on one another.
Farlex Partner Medical Dictionary © Farlex 2012
Hairpinclick for a larger image
Fig. 187 Hairpin . (a) Hairpin. (b) Hairpin loop.

hairpin

a double-stranded structure found in single-stranded NUCLEIC ACID molecules, due to BASE PAIRING between adjacent complementary sequences. The two sequences are inversely arranged and may be directly adjacent, as in a PALINDROME, or interrupted by a non-complementary sequence. In the former case a double-stranded segment (hairpin) is generated; in the latter a hairpin-loop structure forms.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
References in periodicals archive ?
Red Bull's Max Verstappen, trying to break into the top three, attempted to pass Vettel in the hairpin, but the two collided and spun off the track.
For the hairpin SIR structure, the calculation method of the characteristic impedance ratio K and the harmonic suppression bandwidth [DELTA][f.sub.SB] was given in [8].
As each hairpin bend came, I noted the decreasing numbers, now at 38, and tried not to worry that we were still a long way off the final one.
"Frankie fell at Campbell's hairpin towards the end of the Scottish Superbikes race.
The new technology is important for hill road safety, which always includes sharp turns, blind curves and hairpin bends that gives drivers minimal visibility of what is on the other side.
Note however that no complex thermal steps were involved; that specificity arises, much as in PCR, from the complementarity of two DNA regions; and that the strand extension (amplification) could be expected to occur across a relatively wide range of temperatures around the Tm at which the hairpin region is stable, as the hairpin only needs to transiently occur for priming to initiate and an increasingly long and thus stable double-stranded product to ensue.
Under pressure, Rea ran wide at the Old Hairpin and Sykes took the lead to see out the win, despite Rea snatching the lap record along the way.
The sources told that the accident occurred at Miranshah Road near Baka Khel area when a tractor trolley overturned while making a hairpin turn due to which four IDPs including two women, a child and a boy lost their lives while 20 others sustained injuries.
However, another Web site called The Hairpin posted a different birth certificate of the singer in January and according this, Lorde's real age is17 and she was born as Ella Yelich O'Connor in New Zealand.
The first and third sectors of the lap at Sepang feature long straights and hairpin bends, while sector two has some medium and highA[degrees]speed corners, which load up the tyres.
In this paper, we report a miniaturized hairpin BPF based on cross-coupled meandered-line stepped-impedance resonators with high selectivity by IPD technology.
Then primary miRNAs cleaved into 60-90 base-pair-long hairpin intermediate, known as pre-miRNA, by enzymatic activity of the RNase III ribonuclease Dicer [18-20].