int2aa

Convert amino acid sequence from integer to letter representation

Syntax

SeqChar = int2aa(SeqInt)
SeqChar = int2aa(SeqInt, 'Case', CaseValue)


Input Arguments

SeqInt	Row vector of integers specifying an amino acid sequence. For valid integers, see the table Mapping Amino Acid Integers to Letter Codes. Integers are arbitrarily assigned to IUB/IUPAC letters.
CaseValue	Character vector or string specifying the upper or lower case. Choices are 'upper' (default) or 'lower'.

Output Arguments

SeqChar

Amino acid sequence specified by a character vector of single-letter codes.

Description

SeqChar = int2aa(SeqInt) converts SeqInt, a row vector of integers specifying an amino acid sequence, to SeqChar, a character vector or string of single-letter codes specifying the same amino acid sequence. For valid integers, see the table Mapping Amino Acid Integers to Letter Codes.

SeqChar = int2aa(SeqInt, 'Case', CaseValue) specifies the upper or lower case. Choices are 'upper' (default) or 'lower'.

Mapping Amino Acid Integers to Letter Codes

Amino Acid	Integer	Code
Alanine	1	A
Arginine	2	R
Asparagine	3	N
Aspartic acid (Aspartate)	4	D
Cysteine	5	C
Glutamine	6	Q
Glutamic acid (Glutamate)	7	E
Glycine	8	G
Histidine	9	H
Isoleucine	10	I
Leucine	11	L
Lysine	12	K
Methionine	13	M
Phenylalanine	14	F
Proline	15	P
Serine	16	S
Threonine	17	T
Tryptophan	18	W
Tyrosine	19	Y
Valine	20	V
Asparagine or Aspartic acid (Aspartate)	21	B
Glutamine or Glutamic acid (Glutamate)	22	Z
Unknown amino acid (any amino acid)	23	X
Translation stop	24	*
Gap of indeterminate length	25	-
Unknown (any integer not in table)	0 or ≥ 26	?

Examples

Convert an amino acid sequence from integer to letter representation.

s = int2aa([13 1 17 11 1 21])

s =

MATLAB

Version History

Introduced before R2006a