The phrase "a sum of activities" is correct and usable in written English.
It can be used to describe a collection or total of various actions or tasks that are grouped together for a specific purpose.
Example: "The project involves a sum of activities that need to be completed within the deadline to ensure success."
Alternatives: "a collection of activities" or "a total of activities".
As this experimental data is unable to differentiate between ppc-Fos:ppc-Jun and ppc-Jun:ppc-Jun, in our model fitting and subsequent analysis we define an aggregate "Total AP-1" as a sum of the activities of these two AP-1 forms.
The Ca2+ dependent CaMKII activity is calculated as a sum of ser/thr kinase activity in the presence of PKA/PKC inhibitors with or without Ca2+.
Each scale is a sum of the number of activities in that scale in which the participant has some or much difficulty or is unable to do (the ranges for ADL: 0 3, IADL: 0 3, LEM: 0 5, SA: 0 3 activities).
The color that develops in the aforementioned assay experiments is a sum of the ChitO activity on a mixture of different hydrolytic products produced by chitinase or cellulase activity.
In the present paper, we regarded the activities of an MU as the sum of activities of single cells.
A 'sum-model' (3D QSAR – CoMFA) has been developed to design PPARα/γ/δ (peroxisome proliferator activated receptor) pan agonists by using the sum of activities (EC50) of compounds against individual subtypes as a dependent parameter.
To address how the cohesin ATPase activity would be affected by these substitutions, we purified the S. pombe cohesin complex with the analogous mutations (Murayama and Uhlmann, 2014) and assayed the ATPase activity (a sum of the ATP hydrolysis by Smc1 and Smc3 active sites) for equivalent amounts of wild type and mutant cohesin complexes.
The total MMP2 level was calculated as the sum of activities measured at 72 kDa (proenzyme) and 68 kDa (activated enzyme).
Completeness of implementation of five fixed lessons (or components thereof) and four optional activities was calculated as the sum of activities that teachers had ticked as implemented on a list of all proposed activities in each fixed lesson or optional activity, divided by the total number of possible activities in each lesson or optional activity (range 0 to 1).
