The phrase "altered at each" is correct and usable in written English.
It can be used in contexts where something is modified or changed at every instance or occurrence.
Example: "The parameters of the experiment were altered at each stage to ensure accurate results."
Alternatives: "changed at every" or "modified at each".
The OsYSL13 expression level was largely altered at each time point, although this did not influence its expression ratios.
Medications could also be discontinued, or their doses altered, at each physician's discretion.
The genes altered at each time were combined to give a set of genes differentially regulated between NTHi and PBS.
This result suggests that in the two GS mutants there is a core set of proteins corresponding to different biological processes that are specifically altered at each of the two developmental stages examined.
To assess the impact of liver development on putative pathway activation or suppression, IPA was again used to identify pathways significantly altered at each time point in development using those genes described in Figure 1D.
In contrast, in susceptible T200, 67 of the 70 identified R gene homologues were differentially expressed, with some overlaps at the three time points, but many uniquely altered at each dpi.
The number of genes altered at various significance thresholds was assessed for each treatment group (Fig. 2b).
Overall, gene expression was most altered at the 10-hr time point for each brand and concentration, relative to the 6-hr time point.
The remaining glucose exchanges (all 2.5% glucose exchanges except for 2 patients who each had an additional 4.25% glucose exchange) were not altered at any stage.
But this condition was altered at 90 days of curing.
But time and infirmity have altered at least one rule.
