In [ ]:
# - Serine (S), Leucine (L), Tyrosine (Y), Cysteine (C)
# - protein sequence SYLYC, what is the possible DNA sequence?

s = 'TCT'
l = 'CTT'
y = 'TAT'
c = 'TGC'

dna_seq = s + y + l + y + c # SYLYC
print(dna_seq)