Submitted Parts

We have submitted three T7Lac promoter parts to the registry. The followings show the sequences of these constructs.
BBa_K613007: TAATACGACTCACTATAGGGAGAGGAATTGTGAGCGGATAACAA
(BBa_K921000) Mutant I: TAATGCGACTCACTATAGGACAATTGTGGGCGGACAACAATTCCAA
(BBa_K921001) Mutant II: TAATACGACTCACTACAGGGCGGAATTGTGAGCGGATAACAATTCCAA
(BBa_K921002) Mutant III: CAATCCGACTCACTAAAGAGAGAATTGTGAGCGGATAACAATTCCAA

Predicted strength of the hybrid T7Lac promoters

Expected promoter strength of the mutants (relative to BBa_K613007):
Mutant I: <100%
Mutant II: ~100%
Mutant III: ~50%

Expected LacI leaky expression of different mutants:
Mutant I: More than average
Mutant II: Average
Mutant III: Average

RBS used in construct is: CATATG AAGAAGGAGA TATACC ( RBS used in BBa_K112227)

Measured strength of the hybrid T7Lac promoters

We have measured both RNA and protein expression levels of the designed T7Lac promoters using fluorogen-activated biosensors (see details in Methods & Results). These experimental results were analyzed using a mathematical model that we developed in MATLAB (see details in Model). Based on the analysis, we obtained the following properties of the new T7Lac promoters with respect to the wild-type T7Lac promoter.

Promoter	Mutant I	Mutant II	Mutant III
Transcription Strength	97%	72%	127%
Translational Efficiency	6%	6%	94%
RNA degradation constant (assumed)	100%	100%	100%
Protein degradation constant (fit)	4%	6%	60%

Cheemeng:Need to comment on the results here.