This second signal was produced at a higher frequency.
This second signal, which can or cannot be decoded-encoded successfully at the RS, will be sent to the SS in a second time slot using the same constellation size as that of the overheard signal, 4-QAM in this case.
This study tested whether PPP1CA (the catalytic subunit of PP1α), recently identified as contributing to Ras-induced senescence, might be this second signal.
Therefore, we decided to test whether Wnt6 might constitute this second signal.
This second signal is transmitted from the B7-1 and/or B7-2 monecules on the APC to the CD28 molecule on the T-cell [ 52].
This second signal is likely to be a downstream effector of the growth factor signaling network that also drives ISC division and gut epithelial renewal (Jiang & Edgar, 2011; Lucchetta & Ohlstein, 2012).
In the case of HRAS, NRAS and KRAS4A this second signal consists of one or more S-acylation sites ("palmitoylation"), whereas KRAS4B contains a lysine-rich polybasic (hypervariable) domain, located nearby the prenylation side.
This second signal may be triggered by a group of chemically and biologically unrelated molecules such as pathogen-associated molecular patterns (PAMPs), toxins or danger-associated molecular patterns (DAMPs).
TechCrunch understands from a source that this is the first signal that "a deeper partnership between the two may be in the works".
This is the first signal since the policy's rollout in February that the space agency is looking to garner support from the scientific community in its ongoing fight with Congress over the new space-exploration plans.
