Results 71 to 80 of about 166,083,503 (302)
Structural and biochemical analysis of a B12 superbinder
FEBS Letters, EarlyView.BtuG proteins are vitamin B12 scavengers in Bacteroides thetaiotaomicron, a dominant human gut bacterium. We present crystal structures of three BtuG homologs bound to cobalamin and its precursor cobinamide, revealing picomolar binding affinities, among the highest known for any natural protein.
Jose M. Martinez Felices +3 more
wiley +1 more source
Two conditional results about primes in short intervals [PDF]
, 2011 In 1937, Ingham proved that ψ(x + xθ) - ψ(x) ~ xθ for x → ∞, under the assumption of the Lindelöf hypothesis for θ > 1/2. In this paper we examine how the above asymptotic formula holds by assuming in turn two different heuristic hypotheses.
Bazzanella, Danilo, DANILO BAZZANELLA
core +1 more source
Deciphering the Gene Regulatory Landscape Encoded in DNA Biophysical Features
iScience, 2019 Summary: Gene regulation in higher organisms involves a sophisticated interplay between genetic and epigenetic mechanisms. Despite advances, the logic in selective usage of certain genomic regions as regulatory elements remains unclear. Here we show that
Abhijeet Pataskar +5 more
doaj +1 more source
Irregularities in the distribution of primes and twin primes [PDF]
Mathematics of Computation, 1975 The maxima and minima of ⟨ L ( x
openaire +1 more source
The Shewanella oneidensis Fic enzyme SoFic targets the switch‐I region of EF‐Tu for AMPylation
FEBS Letters, EarlyView.Fic enzymes mediate diverse post‐translational modifications across all domains of life, including AMPylation. Prokaryotic EF‐Tu can be AMPylated and deAMPylated by the conserved Fic enzyme SoFic. Structural and biochemical approaches were used to characterize the effect of AMPylation on EF‐Tu, SoFic's enzymatic activities, and the enzyme‐target ...
Svenja Runge +6 more
wiley +1 more source
Prime numbers between squares [PDF]
, 2004 A well known conjecture about the distribution of primes asserts that between two consecutive squares there is always at least one prime number. The proof of this conjecture is out of reach at present, even under the assumption of the Riemann Hypothesis.
Bazzanella, Danilo
core
Distribution Modulo One of αpγ + β for Special Classes of Primes
AxiomsLet α,β∈R with α≠0, and let γ∈(0,5/6). Define the set M1 to consist of primes p such that p+2 is almost prime, and let M2 be the set of primes of the form p=a2+b2+1.
Atanaska Georgieva, Tatiana L. Todorova
doaj +1 more source
Synthesis of Iron Oxide Yellow from Spent Pickling Solutions
MATEC Web of Conferences, 2016 This paper demonstrates a simple environment-friendly synthesis route of iron oxide yellow (α-FeOOH) using spent pickling solutions as raw material. After abundant laboratory experiments, we finally pinned down the best procedure.
Wan Guangqin +3 more
doaj +1 more source
Prime Harmonics and Twin Prime Distribution [PDF]
, 2020 Distribution of twin primes is a long standing problem in the number theory. As of present, it is not known if the set of twin primes is finite, the problem known as twin prime conjecture. An analysis of prime modulo cycles, or prime harmonics in this work allowed to define approaches in estimation of twin prime distributions with good accuracy of ...
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A Scale Invariant Distribution of the Prime Numbers [PDF]
Computation, 2015 The irregular distribution of prime numbers amongst the integers has found multiple uses, from engineering applications of cryptography to quantum theory. The degree to which this distribution can be predicted thus has become a subject of current interest.
Kendal, W. S., Jorgensen, B.
openaire +3 more sources