tuples = [('StemCells', 16.53), ('Bcells', 13.59), ('Monocytes', 11.58), (
    'abTcells', 10.05), ('Macrophages', 9.69), ('gdTCells', 9.49), (
    'StromalCells', 9.36), ('DendriticCells', 9.2), ('NKCells', 7.81), (
    'Neutrophils', 2.71)]
Turning tuples into a pairwise string