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Table 3 Optimized 5′-proximal coding sequence used in this study

From: Enhanced extracellular raw starch-degrading α-amylase production in Bacillus subtilis by promoter engineering and translation initiation efficiency optimization

Nucleotide sequence

Free energy of second structure (kcal/mol)

Hairpin position

5′-Proximal coding sequence

ATGATTCAAAAACGAAAGCGGACAGTTTCGTTCAG

 − 8.2

 < 13

Control

ATGATACAAAAGAGGAAAAGGACGGTTAGTTTTAG

 − 3.7

 > 13

Opt1

ATGATACAAAAGCGAAAAAGGACGGTCAGTTTTAG

 − 3.7

None

Opt2

ATGATACAAAAACGAAAGAGGACGGTCAGTTTTAG

 − 3.8

 > 13

Opt3

ATGATACAGAAACGAAAGCGGACGGTCAGTTTTAG

 − 4.1

None

Opt4

ATGATACAAAAACGAAAGAGGACAGTCAGCTTTAG

 − 4.2

 > 13

Opt5