
Fig. 1. RNA:RNA in situ hybridization in wild-type larval salivary gland polytene chromosome spreads using digoxigenin-labelled hsp70 cDNA without the 3'UTR (A), 87A3'UTR (B) or 87C3'UTR (C) riboprobes. The arrows indicate the 87A and 87C loci. Note the absence of any cross-hybridization of the 3'UTR probes.