1kb BglII-BamHI fragment carrying the coding region of Tn\neoR expressed from an Hsp70 promoter. The Tn\neoR coding region lies between the promoter and the coding region of P\Ths.PSb. Tn\neoRhs.PSb and P\Ths.PSb share the same promoter and their products are presumably produced from a polycistronic message.