Expression of mstnb in different adult tissues of yellow catfish (T. fulvidraco). b, brain; st, stomach; i, intestine; l, liver; sk, skin; m, muscle; k, kidney; sp, spleen; g, gill; h, heart; t, testis; and o, ovary. mstnb expression was detected in the brain, liver, skin, muscle, spleen, testis, and ovary. The expression actinb was served as an internal control.