To detect the dual single-base mutation, the 15-base pair oligonucleotide loop sequence of the Qdot-MB1 was complementary to the 3′end of the DNA target in which mutation existed at the G position while the 15-base pair loop sequence of the Qdot-MB2 was complementary to the 5′end of the DNA target in which the mutation existed at the T position.
Amplicon sequencing of sorted CD8+ Vβ13.1+ and CD8+ T cells not expressing Vβ13.1 confirmed that the mutations existed exclusively in the expanded CD8+ Vβ13.1+ population (Fig. 3c). Figure 3: Somatic mutations occur in expanded CD8+ T-cell clones that persist during follow-up.
More research will be necessary to address the question of whether the mutations exist in different areas of China.
We previously reported that three monoclonal antibodies having epitopes in loop VI showed different binding abilities to different FALS mutants although the mutations exist in locations outside of loop VI [ 11].
FALS-mutant SOD1s apparently give rise to distinct structures of loop VI (residues 102 115 in human SOD1 connecting β6/β7 and designated as a Greek key loop) because three monoclonal antibodies having epitopes in loop VI bind with differing affinities to different FALS mutants, even though the mutations exist in locations other than loop VI [ 11].
To test whether the R46X mutation exists in the gDNA at very low levels, we employed enrichment PCR (ePCR), which involved removal of the non-mutant wild-type gDNA by TaqI RE digestion before nested PCR amplification.
Since no mouse model for the p.R31X mutation exists, we used the in vivo electroporation technique to transfer harm_a1-p.R31X-mRFP reporter constructs into the retina of newborn mouse pups (Goldmann et al, 2011; Matsuda & Cepko, 2004).
However, this is the first report to our knowledge that the identical mutation exists in three classical FAP kindreds.
Acquired resistance is generally caused by the selection of a minor clone initially present in a heterogenous tumor, in which the resistance mutation exists in a subset of cells prior to TKI treatment.
Nevertheless, the potential for spread of pandemic (H1N1) 2009 virus carrying the oseltamivir resistance mutation exists, thereby emphasizing the urgent need for a vaccination to prevent illness and for alternative drugs to treat infected patients.
