Fit-for-purpose heterodivalent single-domain antibody for gastrointestinal targeting of toxin B from Clostridium difficile. - Rodriguez Rodriguez ER; Nordvang RT; Petersson M; Rendsvig JKH; Arendrup EW; Fernández Quintero ML; Jenkins TP; Laustsen AH; Thrane SW (Protein science : a publication of the Protein Society, 2024)