The phrase "a secondary expression" is correct and usable in written English.
It can be used to refer to an expression that is not primary or main, often in contexts discussing language, communication, or symbolism.
Example: "In the poem, the author uses a secondary expression to convey deeper emotions that are not immediately apparent."
Alternatives: "a subordinate expression" or "an ancillary expression".
Activation was further explored by costaining to identify subpopulations that expressed HLA-D, which indicated the secondary expression of class II HLA on activation [31], or coexpressed HLA-D and CD45R0.
For JSD-2 the two input distributions for JSD are changed to the primary isoform expression profile and the primary expression profile + secondary expression profile.
VvF3'H-1 expression lasted till harvest, with a secondary peak of expression one week before harvest, concurrently at the peak of anthocyanin content.
(Later, however, via the Dutch trading settlement at Deshima in Nagasaki Harbour, Western copperplates, Chinese adaptations of Western artworks and techniques, and other secondary expressions made Japanese artists more aware of such techniques as shading, modeling, and single-point perspective).
A secondary readout is expression of FASN, which is an AR-responsive gene (Schirra et al., 2005).
ATRA/retinoic acid receptor (RAR) signaling induces in a secondary response increased expression of FoxO transcription factors.
The cells were then washed and stained for 1 h at room temperature with a secondary antibody, and expression of the protein of interest was quantitated using the LI-COR Odyssey Imaging System.
The ILs could have activated the STATs to initiate a secondary response, inducing expression of the genes in Clusters B and C together with the additional genes predicted to belong to Cluster B. After 4 hours, the transcription factors began to return to their basal level of activity, leading to a near-complete return to initial values of gene expression by 24 hours.
Some of the constructs showed a secondary set of expression patterns in a minority of T1 lines (Additional files 5 and 6); these patterns may be attributable to the sensitivity of the n1/n2GFP reporter constructs which potentially report low levels of endogenous gene transcription not detected using previous approaches.
The loss of DUSP expression is thus almost certainly a secondary consequence of failed expression of Egr molecules.
