This finding is difficult to reconcile with Tat-SF1 being a required Tat cofactor.
Previous studies have shown that the large-scale production of recombinant TAT-Apoptin using a prokaryotic expression is difficult and therefore this has become a bottle-neck [ 17, 18].
Although measuring TAT is a common method when analysing clinical process times, it is difficult to compare studies, because there are many different definitions in use.
"It is difficult, very difficult.
However, TAT-ZFN was difficult to purify in quantities sufficient for analysis in cell culture.
The HIV-1 protein, Tat has been implicated in AIDS pathogenesis however, the amount of circulating Tat is believed to be very low and its quantification has been difficult.
Direct measurements of Tat affinity are problematic, however, because Tat is unstable in vitro in the absence of partners and difficult to maintain in an active form.
His reasoning for this tat is: "nostalgia rules" (true).
A tat is NOT worth a Zero Days.
But as the ERK1/2 activation kinetics were not studied in untreated control cells, the global effects of HIV-1 Tat on ERK1/2 activation dynamics in RPE are difficult to compare.
Successful engagement will be difficult enough without the US drawn into a toxic tit for tat with the Iranian government.
