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$seq = "GAGtatCTGGAAGACAGGCAGACTTTTCGCCACAGCGTGGTGGTACCTTATGAGCCACCCGAGGCCGGCT"; $pos = 0; while ($codon = substr($seq, $pos, 3)) { print "$codon "; $pos = $pos + 3; }
1
GAG tat CTG GAA GAC AGG CAG ACT TTT CGC CAC AGC GTG GTG GTA CCT TAT GAG CCA CCC GAG GCC GGC T