1. Peptides


Cat. No.: HY-P1559
Handling Instructions

GRGDSPC, a 7-amino acid peptide, is a thiolated cell adhesion peptide.

For research use only. We do not sell to patients.

Custom Peptide Synthesis

GRGDSPC Chemical Structure

GRGDSPC Chemical Structure

CAS No. : 91575-26-7

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GRGDSPC, a 7-amino acid peptide, is a thiolated cell adhesion peptide.

In Vitro

GRGDSPC is conjugated to acrylated dextran via thiol-acrylate reaction to regulate the interactions of human mesenchymal stem cells (hMSCs) with the photocrosslinkable hydrogels. To determine the conjugation kinetics and efficiency of GRGDSPC peptide to DEX-MAES16, various GRGDSPC concentrations (i.e., 5, 10 and 20 mg/1 g DEX-MAES16) are conjugated to the acrylated Dextran (DEX) macromer over time (0.25, 0.5, 1 and 3h) in PBS at pH 7.8 and the free thiol groups of unreacted peptides are quantified using Ellman’s assay. In addition, the reaction kinetics of the thiol-peptide to acrylated (DEX-MAES16) and methacrylated (DEX-HEMA16) macromers are compared. As early as 15 min conjugation, with 5, 10 and 20 mg of GRGDSPC peptide/1 g modified DEX, the peptide conjugation efficiencies with DEX-MAES are 105.40, 94.10 and 87.45%, respectively, while for the reaction with the DEX-HEMA they are 0.73, 15.78 and 18.42%, respectively. After 1h, the GRGDSPC conjugation with DEX-MAES is completed with the peptide concentration of 10 mg, but only 35.66% of the thiol groups of the peptide react with DEX-HEMA. The reaction kinetics are also monitored at 3 h of conjugation, and all of the 20 mg GRGDSPC peptide reacts with acrylated DEX compared to only 32.53% for the methacrylated DEX at this time point[1].

Molecular Weight








Sequence Shortening



Room temperature in continental US; may vary elsewhere


Please store the product under the recommended conditions in the Certificate of Analysis.

Solvent & Solubility
In Vitro: 


Peptide Solubility and Storage Guidelines:

1.  Calculate the length of the peptide.

2.  Calculate the overall charge of the entire peptide according to the following table:

  Contents Assign value
Acidic amino acid Asp (D), Glu (E), and the C-terminal -COOH. -1
Basic amino acid Arg (R), Lys (K), His (H), and the N-terminal -NH2 +1
Neutral amino acid Gly (G), Ala (A), Leu (L), Ile (I), Val (V), Cys (C), Met (M), Thr (T), Ser (S), Phe (F), Tyr (Y), Trp (W), Pro (P), Asn (N), Gln (Q) 0

3.  Recommended solution:

Overall charge of peptide Details
Negative (<0) 1.  Try to dissolve the peptide in water first.
2.  If water fails, add NH4OH (<50 μL).
3.  If the peptide still does not dissolve, add DMSO (50-100 μL) to solubilize the peptide.
Positive (>0) 1.  Try to dissolve the peptide in water first.
2.  If water fails, try dissolving the peptide in a 10%-30% acetic acid solution.
3.  If the peptide still does not dissolve, try dissolving the peptide in a small amount of DMSO.
Zero (=0) 1.  Try to dissolve the peptide in organic solvent (acetonitrile, methanol, etc.) first.
2.  For very hydrophobic peptides, try dissolving the peptide in a small amount of DMSO, and then dilute the solution with water to the desired concentration.
Kinase Assay

GRGDSPC at various concentrations (5, 10, 20 mg peptide/g DEX-MAES) is mixed with the 40% theoretical mono(2-acryloyloxyethyl) succinate (MAES) (16% actual)-modified DEX macromer solution containing 0.05% Igracure D-2959 for 0.25-3 h at room temperature to examine conjugation efficiency and kinetics. The peptide conjugation efficiency is determined using Ellman’s assay. In addition, conjugation efficiency of the peptide to acrylated DEX (DEX-MAES16) and methacrylated DEX (DEX-HEMA16) with similar degrees of acrylate and methacrylate modification, respectively, are compared[1].

MCE has not independently confirmed the accuracy of these methods. They are for reference only.

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