The Y chromosome is a useful way of tracking men because it is passed unchanged from father to son, escaping the genetic shuffle between generations that affects the rest of the genome.
This is considered to be a living fossil because it is virtually unchanged from the fossilised specimens found in Triassic deposits.
The presence of both the old and the new flagella in the same cell gives an indication of the time course of events when RNAi is induced in trypanosomes, leading to the appearance of a visible phenotype in the new flagellum while the older one is unchanged because it is not affected by gene silencing.
This in turn suggests that the degree of LD may be strong in regions that are evolutionarily conserved between distantly related species, e.g., humans and mice, because it is evolutionarily conserved regions that remain unchanged by purifying selection [ 16].
Since the authors wish to refer to the function of this head as "a foothold", these mutations would be expected to alter motility by reducing processivity (because it is no longer a very strong MT tether), with increased or unchanged velocity (because it might be easier for Kar3 to pull off the noncatalytic head from MT by force).
Una's mother, who opens a hair salon in her house, disconcerts us precisely because she is unchanged by the tragedy.
Weight loss is infrequent because appetite is unchanged, which helps distinguish this usually benign dysphagia.
That's because the numerator (debt) is unchanged while the denominator (G.D.P).
Data regarding the enzymatic activity of GR and G6PDH further confirm the above considerations: in fact, the activity of both enzymes is unaffected by monomers because the GSSG concentration is unchanged.
Since Sept. 11, United States aviation authorities have been "frantically adopting various El Al security tips, picking up parts of El Al security, but it's just been window dressing" because the basic bureaucratic system is unchanged, Mr. Aviv said.
