Poly-L-glutamic acid (PGA)
Poly-l-glutamic Acid (PGA) for drug delivery, polymer drug conjugation and controlled release. Available in research and GMP grades with custom modifications.
About the Poly-L-glutamic acid
Polyglutamic Acid (PGA) is a biodegradable, water-soluble polyamino acid widely used for advanced drug delivery and bioconjugation applications. Curapath’s proprietary synthesis technology enables the production of PGA with tailored molecular weights and low polydispersity, ensuring consistent performance across pharmaceutical and biomedical applications.
The multiple carboxylic acid groups distributed along the polymer backbone provide exceptional versatility for chemical functionalization. These reactive groups enable the conjugation of drugs, targeting ligands, peptides and other biomolecules, while also forming ionic complexes with cationic therapeutics to increase drug-loading capacity.
Combining biodegradability, tunable chemistry, versatility and scalable manufacturing, . PGA is widely used in polymer-drug conjugates, targeted drug delivery systems, nanoparticles, hydrogels and regenerative medicine, supporting the development of safer and more effective therapies.
Uses of PGA
Drug Conjugation
Polyglutamic Acid provides multiple carboxylic acid groups for the conjugation of small molecules, peptides, proteins, antibodies and targeting ligands.
Its biodegradable backbone enables the development of polymer-drug conjugates with improved pharmacokinetics, stability and therapeutic efficacy.
Targeted Drug Delivery
PGA supports the development of targeted delivery systems through the conjugation of ligands and the formation of ionic complexes with cationic therapeutics. These capabilities enhance payload delivery while enabling selective accumulation at the desired site of action.
Controlled Drug Release
Polyglutamic Acid enables sustained and controlled drug release through its biodegradable polymer backbone. By tailoring molecular weight and polymer architecture, PGA-based systems can optimize release kinetics and improve therapeutic efficacy across a wide range of drug delivery applications.
Regenerative Medicine & Hydrogels
Thanks to its excellent biocompatibility and biodegradability, PGA is incorporated into hydrogels, scaffolds and advanced biomaterials for tissue engineering, regenerative medicine and other biomedical applications.
Formats Available
Degree of polymerization
Curapath’s proprietary synthesis technology enables the production of PGA with tailored molecular weights and low polydispersity, :
- PGA-20
- PGA-50
- PGA-100
- Custom formats
Quality Levels
R&D Grade Polyglutamic acid (PGA)
Ideal for early-stage research, formulation development and proof-of-concept studies. Manufactured under rigorous quality standards with comprehensive analytical characterization for reproducible research.
GMP Grade Polyglutamic acid (PGA)
Manufactured under GMP conditions for clinical and commercial applications. Supported by validated quality systems, batch traceability, regulatory documentation and scalable production.
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Frequently asked questions (FAQs)
What is Curapath
Curapath is a European Contract Development and Manufacturing Organization (CDMO) specialized in non-viral drug delivery systems. We support biotech and pharmaceutical companies from early development through GMP-ready and commercial manufacturing, combining proprietary delivery components, in-house technologies, and deep expertise in complex formulation and CMC development.
Why is Polyglutamic Acid an excellent platform for drug conjugation?
The multiple carboxylic acid groups along the PGA backbone provide reactive sites for the conjugation of small molecules, peptides, proteins, antibodies and targeting ligands. This versatility makes PGA one of the leading biodegradable polymers for polymer-drug conjugates.
Can Polyglutamic Acid be custom functionalized?
Yes. PGA can be synthesized with tailored molecular weights and further functionalized with a wide range of chemical groups, targeting ligands and therapeutic payloads to meet the specific requirements of each application.
Is GMP-grade Polyglutamic Acid available?
Yes. Curapath offers GMP-grade Polyglutamic Acid manufactured under robust quality systems for clinical and commercial applications, together with research-grade and medical device-compliant quality levels.
How does Polyglutamic Acid compare with other polyamino acids?
Unlike cationic polyamino acids such as Poly-L-Lysine and Poly-L-Arginine, PGA is an anionic, biodegradable polymer with multiple carboxylic acid groups. These characteristics make it particularly suitable for controlled drug release, polymer-drug conjugates and biodegradable drug delivery systems.
Why choose Curapath as your Poly-L-glutamic acid supplier?
Curapath combines proprietary PGA synthesis, custom molecular weight control, polymer functionalization and GMP manufacturing within a single CDMO. We support projects from early research through clinical development and commercial supply, providing scalable solutions for advanced polymer therapeutics.
