Another hypothesis might be that above a certain level of replicating mycobacteria, T-cell responses are not detectable in vitro as T-cells might be exhausted or sequestered at the site of infection.
After normalization process, the gene expression levels of replicate experiments were averaged and only genes that were modulated by at least 1.5-fold in the Dbl transgenic lenses relative to the wild type lenses (means of three experiments) were considered differentially expressed.
The levels of replicated, released HBV virions was measured at day five through immunocapture of detergent released nucleocapsids with anti-HBV core Ab and quantification of encapsidated HBV DNA [5].
Multiple levels of replicates are common in two color microarray experiments.
Thus, the probability of inducing a critical mutation is very low at extremely low levels of replicating DNA damage.
When only two levels of replicates were available (for example when testing for DE genes between biopsies in patient 4 there were technical replicates of each biopsy that was tested) the replicates were all treated in the same way.
Virus-specific CD8+ T-cell dysfunction is typically observed during chronic infections with high levels of replicating virus, such as lymphocytic choriomeningitis virus in the mouse or during chronic infection with HIV, HBV and HCV in humans.
In spite of very high viral load (VL) levels during the acute and chronic infection of the dames, and of high levels of replicating virus in milk during acute infection, no case of SIVmnd-1 transmission to offspring was observed during the lactation period.
To select the significant DARs from TAQ data, we discretize the TAQ data by dividing gene expression level of each replicate by the average expression level of sample A that is similar to the calculation of AD method.
The relative expression level of each replicate was calculated according to the comparative CT method (User bulletin no. 2, ABI PRISM 7700 Sequence Detection System, December 1997; Perkin-Elmer, Applied Biosystems).
