>6z20_B mol:protein length:129 Nanobody 4C8 EVQLVESGGGLVQAGGSLRLSCAASGRTFSDYVMGWFRQAPGKERTFVARIGWSGDLTY YADSVKGRFTISRDNAKNTVYLQMNSLKPEDTAIYYCAADERWGTGGKFDYWGQGTQVT VSSHGSGLVPR