A founder effect amplifies any mutation present in a small population that later expands.
The mutation, present in about half of melanoma cases, spurs tumor growth.
Transthyretin amyloidosis represents a spectrum of clinical syndromes that, in all cases except senile systemic amyloidosis, are dependent on the mutation present in the transthyretin (TTR) protein.
One family had a T1155I mutation present in an affected mother and daughter, but not in the mother's parents, thus representing a new mutation.
Like pleomorphic xanthoastrocytoma, ganglioglioma, supratentorial pilocytic astrocytoma, and other predominantly cortical-based glial tumors, ABs often harbor the BRAFV600E mutation, present in 38% of cases tested (n = 21), further distinguishing those tumors from ependymomas and angiocentric gliomas.
PC mice were hosts for the K8484 tumour and were the non-tumour-bearing cage mates of mice that develop KPC tumours; PC mice lack the KRAS mutation present in the KPC mice and hence do not develop tumours.
Yet forensic DNA experts say the mutation described is actually one called 315.1C; it is a very common mutation present in more than 90% of humans of European descent and does little to implicate Kosminski.
They also identified a Val383Ile mutation present in 3 out of 160 type 2 diabetes subjects but in none of the control subjects.
These lines must all have derived from a single spontaneous mutation present in some of the C57BL/6 mice used for the ENU injections.
The JAK2 V617F mutation present in over 95% of Polycythemia Vera patients and in 50% of Essential Thrombocythemia and Primary Myelofibrosis patients renders the kinase constitutively active.
Notably, the spo0F(H101R) mutation is distinct from a separate spo0F(A98P) mutation present in the in vitro passaged 1013 isolates.
