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Table 1 Strains used in this study

From: Enhanced extracellular expression of Bacillus stearothermophilus α-amylase in Bacillus subtilis through signal peptide optimization, chaperone overexpression and α-amylase mutant selection

Strains

Properties

Reference

Strains

 E. coli JM109

endA1, recA1, thi, gyrA96, supE44, hsdR17 Δ (lac-proAB)/F′ [traD36, lacIq, lacZΔM15, proAB+]

Takara

 E. coli BL21

F, ompT, hsd SB (rBmB), gal, dcm

Takara

 B. subtilis RIK1285

Marburg 168 derivative: trpC2, lys1, aprE Δ3, nprR2, nprE18

Takara

 B. subtilis RIK1285AS

B. subtilis RIK1285 containing plasmid pBE-SPAprE-amyS

This study

 B. subtilis WS11

WS4 derivative, ΔwprA, ΔnprB, Δvpr, Δepr, Δbpr, Δmpr, ΔaprE

[23]

 B. subtilis WHS11

WS11 derivative, ΔhrcA

Our laboratory

 WS11QS

B. subtilis WS11 containing plasmid pHYQamyS

This study

 WS11QSP

B. subtilis WS11 containing plasmid pHYQamySP

This study

 WS11RS

B. subtilis WS11 containing plasmid pHYRamyS

This study

 WS11AS

B. subtilis WS11 containing plasmid pHYAamyS

This study

 WS11YS

B. subtilis WS11 containing plasmid pHYYamyS

This study

 WS11YSP

B. subtilis WS11 containing plasmid pHYYamySP

This study

 WHS11YS

B. subtilis WHS11 containing plasmid pHYYamyS

This study

 WHS11YSA

B. subtilis WHS11 containing plasmid pHYYamySA

This study