Toll-like receptor (TLR) 2 and TLR13 from the endangered primitive-ray finned fish Dabry’s sturgeon (Acipenser dabryanus) and their expression profiling upon immune stimulation

•TLR2 and TLR13 were firstly identified from the endangered fish Dabry's sturgeon (Acipenser dabryanus).•Sequence features of TLR2 and TLR13 were analyzed.•Expression patterns of TLR2 and TLR13 in normal tissues of sturgeon were analyzed.•Expression patterns of TLR2 and TLR13 in the primary HK leucocytes following PAMPs stimulation were analyzed.