主权项 |
1. A mutein derived from human neutrophil gelatinase-associated lipocalin (hNGAL), comprising a mutated amino acid residue at one or more amino acid sequence positions selected from the group consisting of amino acid sequence positions 96, 100, and 106 of mature hNGAL (SEQ ID NO:44) and at nine or more amino acid sequence positions selected from the group consisting of amino acid sequence positions 36, 40, 41, 49, 52, 68, 70, 72, 73, 77, 79, 81, 103, 125, 127, 132, and 134 of mature hNGAL (SEQ ID NO:44), and wherein the mutein binds a given non-natural target with detectable affinity. |