Search the STR Database As part of our continuing efforts to characterize and authenticate the cell lines in the Cell Biology collection, ATCC has developed a comprehensive database of short tandem repeat (STR) DNA profiles for all of our human cell lines. View our brief tutorial before starting. STR Profiling Analysis Matching Algorithm Interrogating the Database Please log in to search. The amelogenin gene is a genetic marker used for gender determination and is not comprised of STR units.