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15 maj 2024 · A Stem-loop can be defined as a hairpin-like pattern formed because of the intramolecular base pairing of the nucleotide sequence (especially in palindromic sequence) within the same molecule.
A hairpin is a special case of a turn, in which the direction of the protein backbone reverses and the flanking secondary structure elements interact. For example, a beta hairpin connects two hydrogen-bonded, antiparallel β-strands (a rather confusing name, since a β-hairpin may contain many types of turns – α, β, γ, etc.).
A hairpin is a special case of a turn, in which the direction of the protein backbone reverses and the flanking secondary structure elements interact. For example, the beta hairpin connects two hydrogen-bonded, antiparallel β-strands.
11 sie 2024 · Beta-hairpin or beta-turn This motif is present in most antiparallel beta structures, both as an isolated ribbon and as part of beta sheets. Figure \(\PageIndex{8}\) shows an interactive iCn3D model of the beta hairpin from bovine pancreatic trypsin inhibitor (1k6u)
The structures of commonly occurring loop motifs and β -hairpins are described, with emphasis on their inter-main chain hydrogen bond patterns. Especially new is the realization that β -hairpins occur in four distinct classes that are of evolutionary and structural significance.
Hairpin structure is a pattern that can occur in single-stranded DNA or, more commonly, in RNA. The structure is also known as a stem-loop structure. It occurs when two regions of the same strand, usually complementary in nucleotide sequence when read in opposite directions, base-pair to form a double helix that ends in an unpaired loop.
A hairpin loop is an unpaired loop of messenger RNA (mRNA) that is created when an mRNA strand folds and forms base pairs with another section of the same strand.
