Point-accepted mutation (PAM) data matrix from Dayoff et al. 1978

Figure 3.8 page 81 in Pevsner. Figure 80 Dayhoff et al 1978 (?). Values are the number of observed mutations out of 1572 amino acid substitutions. Multiplied by 10 as specified in original pubs

pams

Format

An object of class data.frame with 20 rows and 21 columns.

Details

As noted by Dayoff et al (1978) "frational exchanges result when ancestral sequences are ambiguous." (pg 346).