Abstract: The present invention relates to the field of protein purification and relates in particular to novel proteins that bind specifically to acid alpha glucosidase (GAA). The invention further relates to fusion proteins comprising novel proteins that bind specifically to GAA. In addition, the invention relates to affinity matrices comprising the GAA binding proteins of the invention. The invention also relates to a use of these GAA binding proteins or affinity matrices for affinity purification of GAA and to methods of affinity purification of GAA using the GAA binding proteins of the invention. Further uses relate to analytical methods for the determination of GAA in liquids.

Abstract: The present invention relates to Fc binding proteins comprising one or more domains with Cysteine in the C-terminal helical region. The invention further relates to affinity matrices comprising the Fc binding proteins of the invention. The invention also relates to a use of these Fc binding proteins or affinity matrices for affinity purification of immunoglobulins and to methods of affinity purification using the Fc binding proteins of the invention.

Abstract: The present invention relates to Fc binding proteins comprising one or more domains with Cysteine in the C-terminal helical region. The invention further relates to affinity matrices comprising the Fc binding proteins of the invention. The invention also relates to a use of these Fc binding proteins or affinity matrices for affinity purification of immunoglobulins and to methods of affinity purification using the Fc binding proteins of the invention.

Abstract: The present invention relates to Fc binding proteins comprising one or more Fc binding domains wherein at least one domain comprises of an amino acid sequence selected from the group consisting of SEQ ID NOs: 1-6 or 21. The invention further relates to affinity matrices comprising the Fc binding proteins of the invention. The invention also relates to a use of these Fc binding proteins or affinity matrices for affinity purification of immunoglobulins and to methods of affinity purification using the Fc binding proteins of the invention.

Abstract: gp64 is the major envelope glycoprotein of baculoviruses. The present invention relates to novel proteins that specifically bind to the baculovirus envelope protein gp64. The novel proteins of the present invention are advanced and powerful tools because they allow precise capturing of gp64 in affinity chromatography. The gp64 binding proteins are particularly useful tools within the process of protein production (e.g. vaccine production) to provide for gp64 free samples. Further, the binding protein for gp64 are useful for methods to analyze the presence of gp64.

Abstract: The present invention relates to novel affinity ligands for the affinity purification of ubiquitin muteins. In particular, the alkaline stable affinity ligands are useful for affinity chromatography purification and detection of a ubiquitin mutein (such as Affilin® protein). The novel affinity ligands for a ubiquitin mutein are based on artificial mosaic proteins of Protein A-like structure. The affinity ligands of the invention can be used for the purification and detection of ubiquitin muteins.

Abstract: The present invention relates to novel proteins that specifically bind to the spike protein or domains thereof of the severe acute respiratory syndrome corona virus 2 (SARS-Cov-2) or variants of SARS-Cov-2. The proteins of the present invention represent advanced and powerful tools, for example for the purification of the virus or a vaccine for the virus, by virtue of said binding affinity for spike protein or domains of the spike protein of SARS-Cov-2 or variants thereof. Thus, the novel proteins of the present invention are particularly advantageous because they allow precise capturing of proteins or particles comprising spike proteins, S1 domain, and/or RBD in affinity chromatography. Further, the novel proteins of the present invention can be used in medical applications caused by or related to SARS-Cov-2 or variants thereof.

Abstract: The present invention relates to Fc binding proteins comprising one or more domains with Cysteine in the C-terminal helical region. The invention further relates to affinity matrices comprising the Fc binding proteins of the invention. The invention also relates to a use of these Fc binding proteins or affinity matrices for affinity purification of immunoglobulins and to methods of affinity purification using the Fc binding proteins of the invention.

Abstract: The present invention relates to novel proteins that specifically bind to complement factor H (CFH). The present invention further relates to methods of production of CFH, in particular purification of CFH. The novel CFH binding ligands of the present invention are advanced and powerful tools because they allow methods of purification of CFH via affinity chromatography.

Abstract: The present invention relates to new type II collagen alpha I chain specific binding proteins. The invention further refers to type II collagen binding proteins further fused to or conjugated to a therapeutically or diagnostically active component. Further aspects of the invention cover the use of these type II collagen binding proteins in medicine.

Abstract: The invention generally relates to targeted compounds for the site-specific coupling of chemical moieties. The present invention features a targeted compound for the coupling of chemical moieties comprising at least one targeting domain capable of binding a target, and at least one linking moiety of up to 80 amino acids, preferably alanine, proline, and serine, and at least one coupling site consisting of cysteine or a cysteine-rich peptide motif (CXC, CXXC, or CXXXC), and wherein said linking moiety connects the targeting domain and a coupling site and/or wherein a linking moiety connects two coupling sites. The invention further features fusion proteins with ubiquitin muteins (Affilin @) as targeting domain. The invention also relates to the use of the targeted compounds for medical applications, in treatment or diagnosis of diseases.

Abstract: The present invention relates to Fc binding proteins comprising one or more domains with Cysteine in the C-terminal helical region. The invention further relates to affinity matrices comprising the Fc binding proteins of the invention. The invention also relates to a use of these Fc binding proteins or affinity matrices for affinity purification of immunoglobulins and to methods of affinity purification using the Fc binding proteins of the invention.

Abstract: The present invention relates to Fc binding proteins comprising one or more domains with Cysteine in the C-terminal helical region. The invention further relates to affinity matrices comprising the Fc binding proteins of the invention. The invention also relates to a use of these Fc binding proteins or affinity matrices for affinity purification of immunoglobulins and to methods of affinity purification using the Fc binding proteins of the invention.

Abstract: The present invention relates to immunoglobulin (Ig) binding proteins comprising one or more domains having highly hydrophobic amino acids with branched side chains (Iso, Leu, Val), or aromatic amino acids (Tyr, Phe, or Trp) corresponding to position 4 or 6 or 8 of the Ig binding protein of SEQ ID NO: 1 or functionally similar proteins. The novel proteins have superior properties for highly efficient purification methods for antibodies (immunoglobulins), for example, the proteins have high binding capacity and high chemical stability. The invention further relates to affinity matrices comprising the Ig binding proteins of the invention. The invention also relates to a use of these Ig binding proteins or affinity matrices for affinity purification of immunoglobulins and to methods of affinity purification using the Ig binding proteins of the invention.

Abstract: The present invention relates to novel proteins that specifically bind to the spike protein or domains thereof of the severe acute respiratory syndrome corona vims 2 (SARS-Cov-2) or variants of SARS-Cov-2. The proteins of the present invention represent advanced and powerful tools, for example for the purification of the virus or a vaccine for the virus, by virtue of said binding affinity for spike protein or domains of the spike protein of SARS-Cov-2 or variants thereof. Thus, the novel proteins of the present invention are particularly advantageous because they allow precise capturing of proteins or particles comprising spike proteins, S1 domain, and/or RBD in affinity chromatography. Further, the novel proteins of the present invention can be used in medical applications caused by or related to SARS-Cov-2 or variants thereof.

Abstract: The present invention relates to novel engineered artificial immunoglobulin (Ig) binding polypeptides comprising three domains and two linkers. The invention further relates to affinity matrices comprising these artificial Ig binding molecules of the invention. The novel Ig binding proteins are particularly useful for the affinity purification of proteins requiring elution at a higher pH (in particular higher than pH 4.2). The invention also relates to a use of the novel Ig binding proteins or affinity matrices for affinity purification of immunoglobulins and to methods of affinity purification using the novel Ig binding proteins of the invention.

Abstract: The present invention relates to the field of protein purification and relates in particular to novel proteins that bind to the soluble part of fibroblast growth factor receptor 3 (sFGFR3). The invention further relates to fusion proteins comprising novel proteins that bind to sFGFR3. In addition, the invention relates to affinity matrices comprising the sFGFR3 binding proteins of the invention. The invention also relates to a use of these sFGFR3 binding proteins or affinity matrices for affinity purification of sFGFR3 nd to methods of affinity purification of sFGFR3 using the sFGFR3 binding proteins of the invention. Further uses relate to analytical methods for the determination of SFGFR3 in liquids.

Abstract: The present invention relates to the field of protein purification and relates in particular to novel proteins that bind specifically to acid alpha glucosidase (GAA). The invention further relates to fusion proteins comprising novel proteins that bind specifically to GAA. In addition, the invention relates to affinity matrices comprising the GAA binding proteins of the invention. The invention also relates to a use of these GAA binding proteins or affinity matrices for affinity purification of GAA and to methods of affinity purification of GAA using the GAA binding proteins of the invention. Further uses relate to analytical methods for the determination of GAA in liquids.

Abstract: The present invention relates to Fc binding proteins comprising one or more domains with Cysteine in the C-terminal helical region. The invention further relates to affinity matrices comprising the Fc binding proteins of the invention. The invention also relates to a use of these Fc binding proteins or affinity matrices for affinity purification of immunoglobulins and to methods of affinity purification using the Fc binding proteins of the invention.

Abstract: The invention relates to fusion proteins comprising at least one extradomain B of fibronectin (ED-B) specific binding domain with high stability in serum and at least one APS domain essentially consisting of or consisting of up to about 80 amino acids selected from alanine, proline, serine, and optionally aspartic acid. The fusion protein further comprises at least one coupling site consisting of at least one cysteine. The invention relates to the use of the fusion proteins or of compositions comprising the fusion proteins for medical applications, such as diagnosis or treatment of cancer or cardiovascular diseases.