d7mdha1    d7mdhb1    d7mdhc1    d7mdhd1 
d7mdha1           0.0       38.8       57.2       39.5 
d7mdhb1          38.8        0.0       63.6       23.9 
d7mdhc1          57.2       63.6        0.0       69.1 
d7mdhd1          39.5       23.9       69.1        0.0