Additional file 4: Table S2. Target predictions for 5′tRF-ProCGG. Seed match between nucleotides 2 and 7 were maintained, and up to 6 mismatches in the remaining sequence were allowed. Two of the target genes predicted play roles in embryonic patterning, cartilage and skeletal development, namely Sec23b and Myst3, which correlates with the expression pattern of 5′tRF-ProCGG (high expression in bone)