They found that mutations occurred most often in the gene that allows Plasmodium to pump chloroquine out of itself.
KRAS mutations occur most frequently in 30 40% of all colorectal cancers [11] and BRAF mutations are present at a frequency of 5 22%, in which the constitutively activated BRAFV600E variant accounts for ∼90% of all the BRAF mutations [12].
In total, it appeared that orientation-switch III mutations occur most frequently in colorectal cancer samples.
For instance, all three methods suggest that transitions are more common than transversions and that C G → T A mutations occur most frequently.
Instead, they were chosen to illustrate important concepts brought to light by recent studies: in the first place, based on current data, it appears that compensatory mutations occur most frequently in strains that already harbor the least costly mutation [ 48].
In malignant hematopoietic diseases, activating Ras mutations occur most commonly in myeloid disorders, in myelodysplastic syndrome (MDS) and AML, with the level of Ras activation ranging from 6 to 37%.
The mutations occurred most frequently in embB (85.3%, 93) and were seldom in embC (2.8%, 3), embA (3.7%, 4), embR (3.7%, 4), and ubiA (8.3%, 9) in EMB-resistant isolates.
An acquired JAK2 mutation occurs in most polycythemia vera patients (>95%) and a majority of patients with essential thrombocythemia or primary myelofibrosis (50 60%).
These mutations which occur most commonly in secondary GBMs significantly predict survival and may confer a survival advantage.
However, oncogenic KRAS mutations, which occur most frequently at amino acids 12, 13, and 61, render KRAS proteins resistant to RasGAP-mediated GTP-hydrolysis.
