Protein sequence manipulation for adding elements before or after the sequence.

how do i add zeros to both ends or one end (before or after) of a protein sequence?

Example:

a protein sequence is given as 'ITYTDCTESGQDLCLCEGSDVCGKGNKCILGSNGEENQCVTGEGTPKPQSHNDGDFEEIPEEYLQ'

how do i add zeros at the beginning before the first element of the sequence?

Answer 1

[Peng Li]

The easiest way to add N zeros before it can be done by:

[repmat('0', 1, N) yourProSeq];

[Nedz]

i think that works for matrix arrays only! I'm refering to only a row of sequence.

[Peng Li]

Why didn't you give a try? by a row of sequence, it could either be a char array or a string. no matter what, it works this way.

char array

>> mm = 'ACGTACGT'

mm =

    'ACGTACGT'

>> [repmat('0', 1, 10) mm]

ans =

    '0000000000ACGTACGT'

string

    >> mm = "ACGTACGT"

mm = 

    "ACGTACGT"

>> repmat('0', 1, 10)+mm

ans = 

    "0000000000ACGTACGT"

[Nedz]

thank you for the help.

[Nedz]

What if i want to add zeroes after the squence (on the right end)?

[Peng Li]

You flip the repmat() stuff and mm in above example.