This disclosure presents techniques and structures for preemption at arbitrary control points in graphics processing. The invention provides further a gene expression cassette that comprised a promoter having a DNA sequence as SEQ ID No: 3, and a polynucleotide that encode an open reading frame and is linked to the 3\u2032 end of said promoter, wherein said promoter can activate the transcription of said polynucleotide in an organism containing said gene expression cassette. The compositions offer flame retardant characteristics while also substantially maintaining the mechanical properties of the base thermoplastic resin, such as the impact strength andor HDT of the composition.