Notes 11-11-09

Initiation-start of transcription
promoter sequenc of bases on DNA that rna polymerase attaches to
enzyme that makes rna copy of dna strand
sigma factor:subunit of rna polymerase attaches specifically to promoter units of dna
most responsible for enzyme attachment to dna promoter sequences
there are different sigma factors that bind to different sequences
different sigma factors produced in response to different conditions