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 ?
I am au fait with Object Orientated Programming, and can play the theme from the Deer Hunter on my guitar blindfolded - but I sat and stared at this infernal hairclip for a good hour, twisting it this way and that, bending it, banging it.
The only disappointment was that after an hour of flicking through the thousands of garments on offer - of which the autumn and winter collection is exclusive to Cardiff for a month before being unveiled across Britain - I left with only a hairclip.
The buckles on the specially dyed and trimmed high street shoes also match the stone of the diamante hairclip.
There were Hobbs scarves, a delicate butterfly necklace with matching hairclip, Chanel earrings, Jackie O-style sunglasses, bangles, beads and brooches, a Gucci handbag, a 50s-sized hard cased purse, barely-worn paisley heels, a Topshop belt, M&S sling backs and an Audrey Hepburn style hat that was instantly snapped up by Radio WM's Jo Malin.
WM loves former Steps star and Rhyl-girl Lisa Scott-Lee but those plaits are a mistake and the eyeliner's a bit dodgy too; Main pic: Crepe dress - pounds 35; (from left) Hawaiian print bikini - pounds 30, Castaway hat - pounds 12; Breton top - pounds 35, cotton trouser - pounds 30, pumps - pounds 45; Bandeau top - pounds 35, cotton mini - pounds 25, Pendant - pounds 10; Floral dress - pounds 45, Bag - pounds 22, Clog - pounds 35, Lily hairclip - 7, Sunglasses - pounds 14.
Officers also found a green hairclip at his home which was identical to one given to Ms Kelly by a niece.
He said he wanted to collect his daughter's hairclip but was told to leave by Mrs Ellis, who claimed he was drunk.
2 KELLY OSBOURNE, 28 Reporting from the red carpet, Kel looked stylish in flowing Tony Ward with a retro hairclip.
1 Cape, pounds 125, Autograph at Marks & Spencer 2 Hairclip, pounds 40, Johnny Loves Rosie 3 Dress, pounds 150, Oasis 4 Gloves, pounds 24.
The woman was wearing a gold religious medal, a gold Celtic cross necklace, Creole-type hoopedearrings and a plain silver-coloured hairclip.
99, New Look 4 Beaded shawl, pounds 45, Maria Grachvogel at Debenhams 5 Satin clutch bag, pounds 14, Accessorize 6 Jewel earrings, pounds 40, Johnny Loves Rosie 7 Jewel hairclip, pounds 6, Accessorize 8 Satin bra, pounds 15, and knickers, pounds 8, Debenhams 9 `Frenchie' perfume with atomiser, pounds 25, French Connection 10 Satin dress, pounds 55, Oasis 11 Indulgence Conditioning Creme, pounds 5.