def findFilenames(reference_fn_str, target_fn_str, filenames, n):
    """
    Find filenames given a start string for UC Davis data

    Parameters
    --------------
    reference_fn_str : str - the control antibody (reference antibody)
    target_fn_str : str - the antibody of interest
    filenames : list of strs - contains the filenames in the folder to search
    n : int
    Returns
    --------------
    reference_name : str - reference antibody filename
    target_name : str - target antibody filename
    """

    reference_str = str(n) + '-' + reference_fn_str  # filename to search for
    target_str = str(n) + '-' + target_fn_str

    # Search for file associated with the specific dataset number
    indices = [i for i, s in enumerate(
        filenames) if reference_str.lower() == s[0:len(reference_str)].lower()]
    reference_name = filenames[indices[0]]
    print(reference_name)
    indices = [i for i, s in enumerate(
        filenames) if target_str.lower() == s[0:len(target_str)].lower()]
    target_name = filenames[indices[0]]
    print(target_name)
    return reference_name, target_name