Sentence examples for proved difficult to isolate from inspiring English sources
Insulin, however, proved difficult to isolate.
It has proved difficult to isolate mutants in which the subcellular location of root hair outgrowth is altered, and difficult to interpret those mutants that do exist, including rhd6, procuste1, and auxin and ethylene mutants [7], [16], [17].
Furthermore, it is noteworthy that insect symbionts such as S. glossinidius and members of the candidate genus Arsenophonus have proved difficult to isolate and manipulate in pure culture because they demonstrate a high level of sensitivity towards oxidative stress when cultures are maintained on agar plates at low cell densities [70].
In contrast, true stem cells, which have proved difficult to isolate, are long-lived populations that replenish specific cell lineages throughout the life of the organism.
It also proved difficult to isolate investments supported by the £30,000 provided to intervention sites from the other investments in modernisation.
AOA have proven difficult to isolate in culture, as evidenced by the fact that only one pure culture [21] has been documented despite reports of several enrichment cultures [12], [22] [25].
Chronic schistosomiasis has been associated with the burden of anemia in these developing regions for many years, although it has proven difficult to isolate and substantiate the association owing to the number of confounding factors that exist within these regions [3], [4].
It has proven difficult to isolate mutants and devise assays that specifically address the mechanism (or mechanisms) of checkpoint silencing.
In the past, such targets have proven difficult to isolate because of the low solubility and low abundance of membrane proteins.
This isolate proved difficult to breed and was lost as a consequence of the relocation from CNR in Pisa to FLI in Jena, precluding further analysis.
Because mountains and streams divide Japan's farm land into small, isolated areas, it proved difficult to unify Japan politically.
