Complex sentence: She has devoted her career to the study of protein function to understand how protein misfolding comes to occur, as it has become implicated with a variety of diseases and disorders such as Parkinson's and Alzheimer's, which are highly prevalent among the aged population.
Split into simpler sentences: She has devoted her career to the study of protein function and mechanisms that contribute to protein misfolding. This is an important area of study because misfolded proteins are implicated in a variety of diseases and disorders such as Parkinson's and Alzheimer's, which are highly prevalent among the aged population.