Non fat milk powder

All the fragments were ligated into pcDNA3.1(+) plasmid, and the constructed plasmids were then verified by DNA sequencing. The pCre-luc (Santa Cruz, CA, USA) was kindly gifted by Xin Xie’s Lab of Tongji University. Human α-melanocyte stimulating hormone (α-MSH) and human adrenocorticotropin ACTH (1–24) was synthesized by Genescript (Nanjing, China). We purchased the paraformaldehyde (4%), phosphate buffered saline (PBS), bovine serum albumin, non-fat milk powder and β-mercaptoethanol from Sangon Biotech (Shanghai, China). TRNzol Universal Reagent and FastQuant RT Kit (with gDNase) were obtained from Tiangen Biotech (Beijing, China). Tetramethylbenzidine (TMB) chromogen solution was purchased from Beyotime^® Biotechnology (Shanghai, China). Hydrochloric acid and sulfuric acid were obtained from Sinopharm Chemical Reagent Co., Ltd (Beijing, China). The antibodies used in this study included Rabbit anti-Flag (Cell Signaling Technology, USA), Mouse anti-HA (Sigma Aldrich, MO, USA), Mouse anti-Flag (Abcam, Cambridge, UK), Goat anti-Mouse IgG (horseradish peroxidase (HRP)-conjugated) (ABclonal Biotech Co., Ltd, Wuhan, China), and Goat Anti-Rabbit Alexa-Fluor 594 (Abcam). All primers used for full-length gene amplification, reverse transcription PCR (RT-PCR), and real-time quantitative PCR are listed in Supplemental Table 1 and synthesized by GENEWIZ (Suzhou, China).

Standards of OTA, ochratoxin C (OTC), and FB₁ were obtained from Pribolab (Singapore). Standards of aflatoxin B₁ (AFB₁) and zearalenone (ZEN) were procured from Fermentek (Jerusalem, Israel). Ochratoxin B (OTB) was purchased from Bioaustralis (Smithfield, NSW, Australia). Non-fat milk powder, 96-well microplates, p-nitrophenyl phosphate (pNPP) substrate, and 3,3′,5,5′-teramethylbenzidine (TMB) were obtained from Sangon Biotech (Shanghai, China). HRP-labeled mouse anti-6 × His tag monoclonal antibody was procured from CWBIO (Beijing, China). Nickel-nitilotriacetic acid (Ni-NTA) sepharose was purchased from Solarbio (Beijing, China). Unfused Nb28 was prepared in the previous study [26 (link)]. All inorganic chemicals and organic solvents were analytical grade.