Sentence examples for molecular clock exists from inspiring English sources

Although this molecular clock exists in nearly every cell of the body, a central pacemaker within the suprachiasmatic nucleus (SCN) is needed to coordinate these clocks with one another and the solar day [ 1].

Although it has been clear for quite some time that no universal molecular clock exists, a new question is emerging about what is the phylogenetic footprint of local molecular clocks.

The clear diel fluctuations in cry1, cry2 and clock gene expression confirm a light-dependent, molecular clock mechanism exists within the scleractinian coral F. fragum and is shared with other cnidarians, including A. millepora [19] and N. vectensis [25].

Because a reliable molecular clock dating existed for the most recent common ancestor (MRCA) of the hCoV-OC43/bovine CoV pair (25 ), this date was set as a normal-distributed probabilistic prior within the published ranges (25 ) for calibration of all analyses.

We took this as evidence for the presence of molecular clock, or more precisely, if a mitochondrial clock exists in Phasianidae, so does a nuclear clock.

Circadian clock exists in many different organisms ranging from bacteria to human.

In other words, there seems to exist a molecular clock that ticks at widely different paces for different protein-coding genes.

Our model performed calculation under two hypotheses, which are commonly adopted and have lead to accurate prediction in the study of HIV-1 virus [ 10]: first, nucleotide variation of these strains occurred by independent mutations at random positions in a single ancestral sequence; second, there exist a molecular clock and a constant rate of evolution.

The molecular clock estimates cannot be used to precisely describe events that occurred thousands, or even tens of thousands of years ago, since sequence data only exist from the last few decades.

Thus, for molecular sequence data, a molecular clock model must be applied to calibrate the tree.

With these data, questions about the molecular clock and species relationships can be explored.