When compared to DNA, poly(dA) · poly(dT) was found to have a smaller pitch (by about 0.5 base pair/turn), whereas poly(dA-dT) · poly(dA-dT) has a slightly larger pitch (by 0.1 base pair/turn). These features correlate well with the known ability of the alternating copolymer ...
The method was applied to a variety of recombinant plasmid DNAs which were constructed by inserting DNA, poly(dA) . poly(dT) or poly(dA-dT) . poly(dA-dT) into pBR322 DNA. When compared to DNA, poly(dA) . poly (dT) was found to have a smaller pitch (by about 0.5 base pair/...
美['helɪkl] 英['helɪkl] adj.螺旋的;螺旋形的 网络螺旋状的;螺旋线;螺旋天线 权威英汉双解 英汉 英英 网络释义 helical adj. 1. 螺旋的;螺旋形的like a helix
The complex of recA protein with single-stranded DNA in the presence of ATP is the active species in the three enzymatic activities of recA: the initiation of strand exchange, the hydrolysis of ATP and the cleavage of repressors. Here we find by cryo-electron microscopy of unstained and unfix...
6. A slight change in the pitch of one round of the spring-shaped assembly was observed along the long axis. Supplementary Video 5 Dynamic of the one tier TIR–SAVED/cA3 filament, eigenvector 2. Video associated with the Supplementary Fig. 6. A slight change in the pitch of one round ...
cal structures including the helical pitch and handedness by atomic force microscopy (AFM). We propose a modular strategy to construct complementary double helices by employing chiral amidinium-carboxylate salt bridges with mterphenyl backbones. The double-stranded helical structures were characterized by...
DNA into spatial periodicities that match the steric size of TLR928,30, which is not possible without higher-order protofibril self-assembly. Interestingly, the AaH protofibrils can adapt their helical pitch to optimize binding: protofibrils of melittin and those of LL37 have pitches that differ ...
Supercoil pitch, P (Å) 153 153.3 / 154.5 148 Superhelix crossing angle χ (°) 25.5 25.5 23.4 α-Helix parameters Residues per turn 3.53 3.54 / 3.53 3.62 α-Helix radius, RI (Å) 2.24 2.20 / 2.25 2.28 * Data from [15]. Superhelical and helical parameters 15, 37 were obtained...
13.Helicase Any of a group of enzymes that catalyze the unwinding of double-stranded nucleic acids such as DNA, using energy from ATP.解螺旋酶(牛酶)一组可以催化象DNA这样双链核酸解螺旋的酶,由ATP提供能量。 14.fixed pitch propeller定螺距螺旋桨固定螺距螺旋桨 15.Of or having the shape of a he...
Our data, which combine multifrequency imaging and Fourier analysis, confirm the structure deduced from averaging techniques (XRD, cryoEM) for surface features of single virus particles, down to the helical pitch of the coat protein subunits, 2.3 nm. Remarkably, multifrequency AFM images do ...