Expected differential expression patterns. Genes expressed by melanophores are expected to correlate positively with the number of melanophores present (1). Likewise, genes under negative regulation should correlate negatively with the amount of melanophores (3). Expression pattern 2 can be anticipated for genes involved in the process of color change.
Henning et al. BMC Genomics 2013 14:171 doi:10.1186/1471-2164-14-171