The phrase "activity have been characterized" is not correct in written English.
It should be "activities have been characterized" to ensure subject-verb agreement.
Example: "The activities have been characterized by a high level of engagement and participation."
Alternatives: "activities have been defined" or "activities have been described".
While no homolog of the plants, fungi, S. pombe or C. elegans RNA dependent RNA polymerases (RdRp) (for a review see [50]) has been identified from the Drosophila to the mammalian genomes, cellular proteins harboring RdRp activity have been characterized.
A number of endogenous ECM-derived fragments with anti-angiogenic activity have been characterized to date [17], [65], and some of these promising molecules were found to bind to either one or multiple integrin receptors (i.e., endostatin, tumstatin, arresten, canstatin, PEX, endorepellin etc) [66].
In larval zebrafish, three stages of seizure activity have been characterized and validated using electrophysiologic and pharmacologic analysis.
Several antifungal CRPs exhibiting antimicrobial activity have been characterized from ascomycetous fungal species from the genera Aspergillus and Penicillium[ 40].
Several small molecules and BH3 peptides capable of directly binding MCL-1 and antagonizing its activity have been characterized such as MIM-1 and small molecule Mcl-1 inhibitor.
Although numerous plant proteins with in vitro telomeric DNA binding activity have been characterized, many of them do not appear to act at telomeres, and may rather represent transcription factors [50].
A GPI-specific phospholipase D (GPI-PLD) activity has been characterized and implicated in the regulation of anchoring, thereby influencing the dispersal of anchored proteins or their maintenance on the cell surface, and possibly in cell signalling.
However, the antimicrobial activity has been characterized for only one of these ABFs, ABF-2.
Intra-group activity has been characterized in terms of propensity of people to reply to questions of other members [30], coherence of discussion topics [31], or item sharing practices [2].
This flurry of activity has been characterized by what might be called methodical spontaneity.
These recombinant enzymes were compared with C. albicans Mnt1, whose activity had been characterized previously [4,14].
