This function uses STRING-api. The outcome of STRING analysis will be stored in comma-separated values files.
PPI(data, FileName = NULL, species = "9606")
Either CSV files stored in the user's file system and its corresponding `data.frame` object in R or and R object containing that information.
A gene list.
A string vector showing the name to be used to save the resulted table. If null, no file will be exported
The taxonomy name/id. Default is "9606" for Homo sapiens.