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.
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.

hairpin

a secondary structure that occurs in single-strand RNA during protein synthesis in which the strand turns back on itself. The structure is the result of base pairing and hydrogen bond formation.
References in periodicals archive ?
You can then snap open the hair clip and put your new decoration in your hair.
The thing is, I've never used a hair clip before in my life.
The file also includes a police picture of the mystery hair clip.
She held Helen in a head lock against her own chest and took a black hair clip and used it on both ears.
Kate McCullagh (020 8747 1220) has a cerise dogrose and black feather hair clip (pounds 90) and a black cinamay headpiece with pink velvet flowers (pounds 130), while Annick Designs offers a cerise and black feather with rose fascinator with veil for pounds 120.
99, New Look Dad wears blue and white striped shirt, pounds 59, Joules; beige chinos, pounds 28, Topman Cupcake stand with cakes, pounds 12, John Lewis Mum wears blue and pink floral dress, pounds 75, and gold shoes, pounds 50, both Topshop; necklace, pounds 8, New Look Lottie wears ruffle vest, pounds 11, yellow floral skirt, pounds 25, white underskirt, pounds 30, all Mini Boden; floral hair clip, pounds 4.
5 Purple print mini, pounds 25, black bikini top, pounds 8, purple print pumps, pounds 20, all Topshop; pink bow hair clip, pounds 4.
She held Helen in a headlock against her chest and took a black hair clip and used it on both ears.
The 22-year-old, who was dropped by Ultimo for breaking the company's strict no nudity clause after she was pictured topless on a beach in Portugal, has posed for good girl gone bad themed 2010 calendar - taking everything off, apart from her hair clip.
White leather sandals, pounds 75, Dune Coloured beaded flower hair clip, pounds 6, Top Shop Purple/brown print dress, pounds 65, Oasis.
99, Office; rose hair clip, pounds 5, M&S, fishnet hold-ups, pounds 6.
A WOMAN of 30 with the mental age of a child was left bleeding after wax was removed from her ears with fingernails and a hair clip at a care home, it has been claimed.