The data domain for Protein-Protein Interactions was defined by a search constructed by CAS subject matter experts and consists of 1,715,782 documents including journal papers, patents, conference proceedings, dissertations, and preprints published between the years 2000 and 2022. The documents in the data set are extracted from CAS WBMV database. For each document in our dataset, we obtain: the year of publication, type of document, CAS section, CAS subsection, up to date citations, abstract, and title. There was a total of 19,145,778 citations for the documents in the dataset at the time our research was carried out. For identifying candidate phrases we considered all n-grams containing 2 to 6 words from the abstract and titles of the documents after performing Natural Language Toolkit (NLTK) procedures lemmatization and removal of English stop words by using the python library implementation of NLTK.