'How to extract a part of a protein sequence in reverse using Python [duplicate]

Suppose I have a list of protein sequences:

VLQSDLYTLSSSVTV
WKLYSKVKPLLNVAR
YNTSLRTMPTMIWTW
GVDFYSTITRARFEE

I want to extract only the last 4 residues (last four characters) from the sequences (in reverse order), such as

VTVS
RAVN
WTWI
EEFR

How to do that with Python code?

python

Solution 1:^[1]

Via a list comprehension:

a = ['VLQSDLYTLSSSVTV', 'WKLYSKVKPLLNVAR', 'YNTSLRTMPTMIWTW', 'GVDFYSTITRARFEE']
b = [x[::-1][0:4] for x in a]

Each x is a string from the list a. The portion x[::-1] reverses that string. The first four characters of the reversed string are extracted via ...[0:4]. The list b contains each of these results.

Solution 2:^[2]

s = "VLQSDLYTLSSSVTV WKLYSKVKPLLNVAR YNTSLRTMPTMIWTW GVDFYSTITRARFEE"
words = s.split()
for word in words:
    print(word[-1:-5:-1])

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'How to extract a part of a protein sequence in reverse using Python [duplicate]

Solution 1:[1]

Solution 2:[2]

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Related Questions

Solution 1:^[1]

Solution 2:^[2]