Download and filter for position-frequency matrices datasets. Input a collection
of keywords to filter the PFM dataset. For example, if you were interested in filtering
for the ETS TF Family, you would input ETS, ETV, GABPA, FLI, and so on. These PFM
datasets enable screening of many TFs over a single enhancer sequence at once, and are
inputs to the "Visualize TF Sites", "in silico Mutagenesis", and
"Compare TF Sites Across Enhancers" modules.