Functional Marine Proteins & Peptides

A fish is not only fillet, and a shellfish is not only meat. Behind the familiar marine ingredients sits a quieter shelf — proteins that do things rather than merely nourish. Lectins that read sugars with striking precision. Glycoproteins that tame ice in ways most food scientists only dream of. Antimicrobial peptides that defend marine organisms without a single antibiotic.

Eata Marisource supplies these functional marine proteins and peptides as characterized, documented materials for research programs and industrial development. Three families currently anchor the portfolio — marine lectins, marine glycoproteins and marine antimicrobial peptides — each available in native-purified or recombinant form, with batch documentation and activity data that give your team a defensible starting point.

Product Range at a Glance

The table below is the working shortlist we ship most often — a starting grid rather than the full menu. Every line can be adapted to your specification, from source species to final packaging.

Product Family	Marine Source	Typical Form	Grade	Primary Use
Marine Lectins	Fish mucus, shellfish & sponge tissue	Lyophilized powder	Research grade	Glycobiology, agglutination & binding assays
Marine Glycoproteins (AFGP)	Polar fish	Lyophilized powder	Purified / recombinant	Ice structuring & cryopreservation research
Marine Antimicrobial Peptides	Fish skin mucus, horseshoe crab, mussels	Lyophilized powder / solution	≥ 95% (research)	Antimicrobial mechanism studies

A rocky tidepool with barnacles, seaweed and shells in natural light.

Fig. 1 The starting shelf: marine organisms whose tissues carry functional proteins.

Marine Lectins

Lectins are carbohydrate-binding proteins, and the marine world is an unusually rich source of them. Fish mucus releases galectins that recognize β-galactoside structures; shellfish and sponges produce C-type and other lectins with defined glycan preferences. What unites them is specificity: a marine lectin can distinguish one sugar arrangement from another, which is why these proteins appear again and again in binding studies, agglutination assays and glycobiology workflows.

What we supply in this family is characterized material rather than anonymous protein:

Parameter	Typical Offering
Source	Fish skin mucus, shellfish tissue, marine sponge tissue (species on request)
Binding specificity	Documented per lot (e.g. β-galactoside, sialic acid, GlcNAc families)
Form	Lyophilized powder, reconstituteable in buffer
Purity	≥ 90% by SDS-PAGE (research grade)
Activity	Agglutination titer reported with each batch
Packaging	Vials from 1 mg; bulk by arrangement

Fresh marine ingredients including fish fillet, shrimp and mussels on a wooden board.

Fig. 2 Diverse marine raw materials enter the program as sourced, documented biomass.

Marine Glycoproteins

The standout members of this family are the antifreeze glycoproteins (AFGPs) that polar fish use to survive sub-zero waters. Built from repeating alanine-alanine-threonine units carrying a galactose-N-acetylgalactosamine disaccharide, AFGPs come in several classes spanning roughly 2.6 to 33.7 kDa, and their ice-binding behavior has made them a fixture in cryopreservation and frozen-material research.

Where native harvest is impractical, recombinant ice-structuring glycoproteins offer a consistent alternative; we can supply either route depending on your program's needs.

Parameter	Typical Offering
Source	Cold-ocean teleost fish (native); recombinant expression (E. coli / yeast)
Class	AFGP isoforms and ice-structuring glycoproteins
Form	Dry powder after purification; solution on request
Characterization	Molecular weight, purity and ice-binding activity per lot
Applications served	Cryopreservation, ice recrystallization studies, frozen food science

Frosted cryogenic vials in a rack on a cold laboratory surface.

Fig. 6 Cold-chain handling matters especially for glycoproteins that work with ice.

Marine Antimicrobial Peptides

Marine organisms have spent hundreds of millions of years refining their own defenses. Their antimicrobial peptides are short, cationic and amphipathic, and the best-known examples carry precise names: pleurocidin from the winter flounder, tachyplesin I and II from the horseshoe crab, polyphemusins from the American horseshoe crab, and a lengthening list from mussels, shrimp and fish.

Peptide	Marine Origin	Typical Features (Reported)
Pleurocidin	Winter flounder skin mucus	25-residue cationic, amphipathic α-helical peptide; broad-spectrum activity in vitro
Tachyplesin I / II	Horseshoe crab (Tachypleus tridentatus)	17-residue cationic peptide; activity against Gram-positive, Gram-negative and fungal strains reported
Polyphemusins I / II	American horseshoe crab (Limulus polyphemus)	Cationic β-hairpin peptides; studied against E. coli, Salmonella and Pseudomonas
Myticin / peneaidin families	Mussels, shrimp	Species-specific AMP families from shellfish and crustaceans

Typical delivery is lyophilized powder at ≥ 95% purity with HPLC and mass-spectrometry documentation; custom sequences can be produced to order.

Lyophilized protein cakes inside clear glass vials.

Fig. 3 Column chromatography is the workhorse behind purified marine proteins.

One Platform, Three Shelves

Three different molecules, one production logic. Every family passes through the same disciplined path from marine biomass to a documented final material:

Extraction and fractionation. Tissue is processed under controlled conditions to preserve the protein or peptide of interest.
Purification that is actually measured. Chromatography and HPLC steps target the required purity, with SDS-PAGE and mass-spectrometry checks along the way.
Activity where it matters. Binding, agglutination, ice-activity or antimicrobial testing is reported per lot where the assay is established — not waved away as a certificate.
Storage built for stability. Lyophilized material is packed for dry, cold and light-protected conditions, with stability guidance in the documentation set.

A 96-well plate with clear liquid samples in its wells.

Fig. 4 Lyophilized cakes — the standard delivery form for lab-scale and pilot quantities.

Where These Molecules Earn Their Place

Functional marine proteins seldom arrive with one use-case attached; they earn their place across a spread of disciplines. The map below shows where each family tends to appear:

Application Area	Leading Family	What It Brings
Glycobiology & diagnostics	Marine lectins	Defined glycan recognition for profiling, purification and detection concepts
Cryobiology & food science	Marine glycoproteins	Ice structuring and recrystallization control in cold-chain research
Infection & preservation research	Marine antimicrobial peptides	Membrane-active peptides for mechanism studies and alternative preservative concepts
Biomaterials & functional surfaces	All three families	Marine-origin functionality for coatings, assays and biointerfaces

Fig. 5 Activity and purity checks are measured, not assumed.

Custom Programs: Your Sequence, Your Specification

A research-grade protein is rarely perfect straight off the shelf — it becomes useful once it matches your assay, your buffer, your scale. We can adapt source species and purification depth, switch delivery between lyophilized powder and solution, adjust packaging to your storage protocol, and produce custom peptide sequences to your design. Share the specification and we will confirm feasibility, then run the material to it.

Catalog Number	Product Name	Order	Quantity
MPP-0009	Salmon Nasal Cartilage Extract (Proteoglycan and Undenatured Type II Collagen Complex, GAG above 30 Percent)	Inquiry	- +

For Research or Industrial Raw Materials, Not For Personal Medical Use!