Abstract: This invention relates to a mutant E. coli heat-labile enterotoxin (LT) subunit A that can be used as an adjuvant. This subunit A mutant contains an amino acid substitution at a position corresponding to position 61 of a wild-type LT. An LT containing this mutated subunit A exhibits reduced toxicity compared to its wild type counterpart.

Abstract: The invention relates to an improvement for applying a layered structure (1) onto a convex surface of a lens (10). After thermoforming the layered structure, a curvature direction of the layered structure is inverted. The structure is then applied on the lens surface by continuously pushing the structure (1) against the lens surface, starting from a contact point between a convex surface of the structure and the convex surface of the lens. The curvature direction of the layered structure is then inverted again, so that it recovers the curvature direction that resulted from thermoforming. Stresses within the layered structure are then reduced, and the structure can be assembled with the lens without defects.