Sentence examples for has been uncertain with from inspiring English sources
It is known that calpain is involved in the migration of slow moving cells such as fibroblasts, but whether calpain makes a contribution to the migration of immune cells has been uncertain with reports of a suppressive role in myeloid cells [22] and a recent study in T lymphocytes indicating a null effect [23].
The exact number of date palm chromosomes has been uncertain with some publications reporting 14, 16, or 18 pairs [ 6, 7] with most evidence pointing to 18 pairs [ 5].
The number of paralogous IAP LTRs in the genome has been uncertain with estimates ranging from less than 1000 to over 9000 with significant polymorphism among strains [ 10, 14, 15].
We know from the fossil record that turtles evolved at least 220 million years ago, in the Triassic period, but their ancestry has been uncertain, along with their relationship to other reptile forms.
In foreign policy, Europe has been uncertain in its dealings with a resurgent Russia; and its attempts to stop Iran going nuclear seem to be coming to nothing.Set against such concerns, the fate of the EU constitution seems trivial.
My survival has been uncertain enough that I've never decided whether I should do anything serious with my life.
Henry appears to have been uncertain what to do with Rhys, but after a few weeks decided to free him and allow him to rule Cantref Mawr.
Doctors have been uncertain until now whether treating asthma with inhaled steroids actually saves lives.
The launch had been uncertain until late in the morning, with meteorologists warning of inclement weather conditions closing in on the launchpad at the Kennedy Space Centre in Cape Canaveral, Florida.
