Zhang, C., Xiang, X., Liu, J., Huang, Y., Xue, J., Sun, Q., Leng, S., Liu, S., He, X., Hu, P., Zhan, X., Qiu, Q., Yang, S., Brosius, J., Deng, C. (2025). Constitutively active glucagon receptor drives high blood glucose in birds. Nature. https://doi.org/10.1038/s41586-025-08811-8