Abstract: Disclosed are compounds that comprise: (i) a Kunitz domain polypeptide that comprises a Kunitz domain that binds to and inhibits a protease; and (ii) a plurality of polyethylene glycol moieties attached to the Kunitz domain polypeptide. Each accessible primary amine of the Kunitz domain polypeptide can be attached to one of the moieties. Also disclosed are related methods.

Abstract: The present invention provides methods for making heteromultimeric molecules, such as bispecific antibodies, and compositions comprising said molecules. The method includes introducing mutations in amino acids that are in contact at the interface of two polypeptides, such that the electrostatic interaction between the ion pairs is altered.

Abstract: The invention provides compositions and methods for therapeutic and diagnostic applications.

Abstract: The invention provides compositions and methods for therapeutic and diagnostic applications.

Abstract: A polypeptide or multimeric polypeptide construct having the ability to bind to cMet or a complex comprising cMet and HGF, and methods for use are disclosed.

Abstract: A polypeptide or multimeric polypeptide construct having the ability to bind to cMet or a complex comprising cMet and HGF, and methods for use are disclosed.

Abstract: The present invention provides polypeptides, peptide dimer, and multimeric complexes comprising at least one binding moiety for KDR or VEGF/KDR complex, which have a variety of uses wherever treating, detecting, isolating or localizing angiogenesis is advantageous. Particularly disclosed are synthetic, isolated polypeptides capable of binding KDR or VEGF/KDR complex with high affinity (e.g., having a KD<1 ?M), and dimer and multimeric constructs comprising these polypeptides.

Abstract: Disclosed are compounds that comprise: (i) a Kunitz domain polypeptide that comprises a Kunitz domain that binds to and inhibits a protease; and (ii) a plurality of polyethylene glycol moieties attached to the Kunitz domain polypeptide. Each accessible primary amine of the Kunitz domain polypeptide can be attached to one of the moieties. Also disclosed are related methods.

Abstract: Compositions comprising non-naturally occurring serum albumin binding moieties are described, together with methods of use thereof, e.g., for detecting or isolating serum albumin molecules in a solution, for blood circulation imaging, and for linking therapeutics or other molecules to albumin. Preferred serum albumin binding peptides having a high affinity for human serum albumin are particularly disclosed.

Abstract: Compositions comprising non-naturally occurring fibrinogen binding moieties are described, together with methods of use thereof, e.g., for detecting or isolating fibrinogen molecules in a solution, for blood circulation imaging, and for linking therapeutics or other molecules to fibrinogen. Preferred binding peptides having a high affinity for fibrinogen are particularly disclosed.

Abstract: The present invention provides binding moieties for fibrin which have a variety of uses wherever detecting, isolating or localizing fibrin, and particularly fibrin as opposed to fibrinogen, is advantageous. Particularly disclosed are synthetic, isolated polypeptides capable of binding fibrin and recognizing the form of polymerized fibrin found in thrombi. In addition, the polypeptides have a slow dissociation rate from fibrin, which improves their ability to form a contrast image at the site of a fibrin clot, making the disclosed binding moieties particularly useful as imaging agents for thrombi.

Abstract: Disclosed is an artificial target-specific ligand that binds to both serum albumin and a particular molecular target. Interaction with serum albumin improves properties when administered to a subject. For example, an interaction between the ligand and serum albumin can extend the half-life of the ligand in circulation.

Abstract: Disclosed, inter alia, is a method of evaluating a sample that includes a serum protein and one or more one or more compounds physically associated with the serum protein. The method can include using a peptide ligand that specifically interacts with the serum protein to analyze a complex formed by the serum protein and its associated compounds.

Abstract: Compositions comprising non-naturally occurring fibrinogen binding moieties are described, together with methods of use thereof, e.g., for detecting or isolating fibrinogen molecules in a solution, for blood circulation imaging, and for linking therapeutics or other molecules to fibrinogen. Preferred binding peptides having a high affinity for fibrinogen are particularly disclosed.

Abstract: The present invention provides binding moieties for fibrin which have a variety of uses wherever detecting, isolating or localizing fibrin, and particularly fibrin as opposed to fibrinogen, is advantageous. Particularly disclosed are synthetic, isolated polypeptides capable of binding fibrin and recognizing the form of polymerized fibrin found in thrombi. In addition, the polypeptides have a slow dissociation rate from fibrin, which improves their ability to form a contrast image at the site of a fibrin clot, making the disclosed binding moieties particularly useful as imaging agents for thrombi.

Abstract: Compositions comprising non-naturally occurring serum albumin binding moieties are described, together with methods of use thereof, e.g., for detecting or isolating serum albumin molecules in a solution, for blood circulation imaging, and for linking therapeutics or other molecules to albumin. Preferred serum albumin binding peptides having a high affinity for human serum albumin are particularly disclosed.