Table 2 The ingredients of SP1 and SP2 media

SP1

Glucose 0.5% + MgSO₄ -7H₂O 0.02%, Casamino acid 0.02%, Tryptophan 0.005%, (NH₄)₂SO₄ 0.2%, K₂HPO₄ 1.4%, KH₂PO₄ 0.6%, Na₃C₆H₅O₇-2H₂O 0.1%

SP2

Glucose 0.45% + MgSO₄ -7H₂O 0.018%, Casamino acid 0.009%, Tryptophan 0.00045%, (NH₄)₂SO₄ 0.18%, K₂HPO₄ 1.26%, KH₂PO₄ 0.54%, Na₃C₆H₅O₇-2H₂O 0.09%