Therefore, optimal and effective T cell activation can only be achieved by the recognition of two different antigens simultaneously on the tumor cells, while sparing normal tissue that may only express one of these two antigens (Fig. 2A).
Zebrafish neutrophils were found to express vegfaa and vegfd in both untreated and TNBS-treated larvae, however, we did not consistently obtain an RT-PCR product for vegfc (Fig. 3C), suggesting that zebrafish neutrophils may only express low levels of vegfc mRNA.
Additionally, GABAAR-β1 may only be expressed on the small population of cells expressing GAD, therefore its levels in a whole cell preparation may be reduced.
As IDEF1 and IDEF2 are constitutively expressed in roots and shoots in rice, other regulatory factors which may only be expressed under Fe limiting conditions may be involved in regulating the response to Fe deficiency.
Interestingly, all 9 novel miRNAs families showed extremely low expression levels, indicating that these miRNAs may only be expressed in certain physiology processes and may be the reason for why these miRNAs have not been detected until now.
Some of these additional factors, however, may only be expressed or active under a particular growth condition and therefore may also need to be conditionally expressed along with the transcription factor.
We anticipate that CD53 may only be expressed during later stages of B cell development in the bone marrow when the (pre- BCR is expre- BCR whish is in linexpressed earlier study showhichlower levels of CD53 is earlinr maturation stages of B celinewithin bone manrow (Barrearlieral. 2005).
"That may be because Her-2 may only be expressed in the biopsy area and not elsewhere in the tumor," says Ishaque. "By measuring Her-2 with molecular imaging, we'd have a better idea of how much Her-2 is present in a tumor and how well patients will respond to Herceptin".
In fact, [38] suggests that the risk of T-cell depletion, illustrated as a linear function in Figure 5 (solid line), may only be expressed at very high levels of allelic diversity that is not observed in nature.
However, a gene that is "on" may only be expressed at moderate levels.
