TY - RPRT TI - Are cross-regulatory interactions between homoeotic genes functionally significant? AU - A González-Reyes AU - N Urquia AU - W J Gehring AU - G Struhl AU - G Morata PY - 1990 DO - 10.1038/344078a0 UR - https://pubmed.ncbi.nlm.nih.gov/1968232/ ID - 1968232 ER -