Gibson assemblies of the three different streptavidin constructs worked and sequencing results matched with what expected. The growth curve of transformed E.Coli showed delayed growth, but bacteria still divide with an acceptable rate. The assay with a fluorescent biotin supposed to bind streptavidin gave some positive results (some bacteria appeared fluorescent when excited at the corresponding wavelength) but since the negative control also showed fluorescence, nothing could be proved. However, a Western blot against streptavidin showed bands at the expected size around 50 kDa of streptavidin, proving that it was expressed.