Chick Spry2 is a predicted target of a number of microRNAs. (A). Sequence alignments show miR predicted targets sites within the 3’UTR of chick Spry2 and chick microRNA sequences of mir-21, mir-23, mir-27, mir-122, and miR-128. Complementary nucleotides are highlighted in red and seed sequence of each microRNA is highlighted in grey. (B) Northern blot showing expression of the microRNAs-21, -23, -27, -122 and -128 in epithelial somites at HH10 (1.5 days) and HH27 (5-days) of chick embryo development, U6 nuclear snRNA was used as an internal control.