All green Bartletts come from similar strains, but other mutations exist, as I discovered walking with Wally Chan, one of the last Chinese-American pear growers, in Courtland.
They do know that BRCA1 is a large gene that directs the body to produce an unusually big protein molecule, and that several hundred different BRCA1 mutations exist, some of which greatly increase a woman's risk of breast and ovarian cancer.
This information has already proved useful: research by Derek Smith of Cambridge University, for example, reported that two of the implicated mutations exist in naturally circulating H5N1.Progress since then has been slow.
Stranger mutations exist too: there is a pickup that drives through the city with a sculptural recreation of the photo rising from its bed, and a picture of someone's Lego reconstruction circulates on the Internet.
Different mutations exist such as gain or loss of function mutations and neutral mutations.
To investigate whether LHX1 gene mutations exist in Han Chinese patients with müllerian duct abnormalities (MDAs).
In fact, sequencing data has revealed that mutations exist in genes involved in nearly all aspects of epigenetics, including DNA methylation, covalent histone modification, and chromatin remodeling (Fig. 2).
Although it is accepted that resistant properties occur after pharmacological treatment, researchers have found that some resistance-related mutations exist prior to treatment (Denis et al., 2015; Gurden et al., 2015).
On the other hand, for the aim of finding out if specific gene mutations exist in EGFR-expressed cells, not accurately sequencing the whole genome of every cell, our design is a practical alternative to expensive deep sequencing of single cells.
It is likely that other mutations exist and that they may mediate altered enzyme activity in these individuals [32].
If no such mutations exist, then although we may perceive two phenotypes under selection, these phenotypes contribute only a single trait toward determining phenotypic complexity.
