d7mdha2    d7mdhb2    d7mdhc2    d7mdhd2 
d7mdha2           0.0        7.1       11.5       63.4 
d7mdhb2           7.1        0.0       21.0       58.9 
d7mdhc2          11.5       21.0        0.0       50.1 
d7mdhd2          63.4       58.9       50.1        0.0