Reptiles matrices

The above description can be framed by a Markov process in the following way. A reptile was defined as system and the following states shown in the figure were selected, i.e. Si = reptile at position i, i = 1, 2,..., 11. On the basis of above states, the following matrix may be established. Some assumptions made were ... 

Although theories of the Rouse-Bueche-Zimm type have been very successful in rationalizing the behavior of polymeric systems from a molecular point of view, another class of theories is presently commanding the most attention. These theories treat the motion of polymer molecules in terms of reptation, a reptile-like diffusive motion of each polymer molecule through a matrix formed by its neighbors. To a considerable extent, this new approach has overcome some of the most important shortcomings of the normal-mode theories, which... 

The one serious anomaly in Fig. 11 is the strange position of rattlesnake, with a reverse bend in the tree. Rattlesnake cytochrome is much less like that of other reptiles and birds than it should be, as the matrix of Table XI confirms. From amino acid sequences alone, rattlesnake might more properly be grouped with the primitive fish. While turtle differs from birds and mammals by 6-15 residues, snake differs by 14 -22. It is as different from turtle (22 residues) as from any of the birds and... 

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