The phrase "a key player affecting" is correct and usable in written English.
It can be used to describe someone or something that has a significant influence on a situation or outcome.
Example: "In the negotiations, she was a key player affecting the final agreement between the two parties."
Alternatives: "a major influence on" or "a significant contributor to".
The next section explores the multiple interactions between the key players affected by the reforms and provides an insight into the positive and negative responses triggered by the changes that took place in Bangladesh and Uganda in the context of the reforms.
The loss of these two key players affected the team's placement in many publications' preseason polls as well as their chances of winning a national championship.
Mohamed cited as an example the International Committee of the Red Cross, one of the biggest humanitarian relief organizations in the world and a key player in helping those affected by Syria's civil war.
Finally, this repression is sensitive to mutations affecting aubergine, a key player of the piRNA pathway.
The intestinal microbiota could be a key player in this programming because it affects host metabolic homeostasis, postnatal gut colonization is sensitive to early nutrition, and initial microbial set-up is thought to shape microbiota composition for life.
We thus assumed that nicotine may directly affect chondrocytes, a key player in endochondral ossification.
Tropospheric ozone is a key player in a number of atmospheric processes that affect both climate and air quality.
Localization of Cdc5 was not affected by mutation of CDC42, a key player in morphogenesis checkpoint[34].
DNA topoisomerase I, a key player during DNA replication, is regulated by nuclear heparanase, thus affecting cell proliferation of breast cancer cells in brain metastases [ 84].
VEGFA is a key player in this process, as alterations of VEGFA levels severely affect vascularization (Healy et al., 2000; Zhao et al., 2005; Akeson et al., 2003; Ng et al., 2001).
