LetA defines a structurally distinct transporter family - Cristina C. Santarossa; Yupeng Li; Sara Yousef; Hale S. Hasdemir; Carlos C. Rodriguez; Max A. B. Haase; Minkyung Baek; Nicolas Coudray; John G. Pavek; Kimber N. Focke; Annika L. Silverberg; Carmelita Bautista; et al. (Nature, 2026)