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Sigma 28
-35 = TAAA and -10 = GCCGATAA.
Sigma 32
A sigma factor that recognizes promoter sequences for heat shock genes, specifically for the sequences -35 = CTTGAA and -10 = CCCCATTA.
Sigma 54
A sigma factor that recognizes promoter sequences in nitrogen-fixation genes, with the sequences -35 = CTTGPyAPyPu and -10 = TTGCA.
Sigma 70
A sigma factor that recognizes promoter sequences for most genes in stationary phase, specifically for the sequences -35 = TTGACA and -10 = TATAAT.