BioBrick parts are DNA sequences which conform to a restriction-enzyme assembly standard.[1][2] These building blocks are used to design and assemble larger synthetic biological circuits from individual parts and combinations of parts with defined functions, which would then be incorporated into living cells such as Escherichia coli cells to construct new biological systems.[3] Examples of BioBrick parts include promoters, ribosomal binding sites (RBS), coding sequences and terminators.
knight
was invoked but never defined (see the help page).