substitution {aphid} | R Documentation |

## Substitution matrices.

### Description

A dataset containing several popular substitution scoring matrices
for DNA and amino acids.

### Usage

substitution

### Format

A list of 71 matrices, most of which have 24 rows and 24 columns
corresponding to the 20-letter amino acid alphabet plus the ambiguity codes B, Z,
X and *:

- PAM
the PAM matrices from PAM10 to PAM500.

- BLOSUM
the BLOSUM matrices from BLOSUM30 to BLOSUM100.

- others
also included are the DAYHOFF, GONNET, IDENTITY
and MATCH substitution matrices for amino acids,
and the NUC.4.2 and NUC.4.4 substitution matrices for DNA.

### Source

ftp://ftp.ncbi.nih.gov/blast/matrices/

[Package

*aphid* version 1.3.3

Index]