TY - RPRT TI - HepI and OpsX are functionally coupled but evolutionarily asymmetric heptosyltransferase variants: ecological transitions and operon modularization drive divergent constraints and flexibility AU - Mallick Gupta, A. AU - Arevalo, P. AU - Taylor, E. A. PY - 2026 DO - 10.64898/2026.06.09.731171 UR - https://www.biorxiv.org/content/10.64898/2026.06.09.731171v1 ID - 10.64898/2026.06.09.731171 ER -