Creative PEGWorks Cholesterol-PEG-NHS

描述

胆固醇-PEG-NHS酯与胺反应形成稳定的酰胺键用于生物偶联。胆固醇是细胞膜成分，具有调节膜流动性、弹性和渗透性的功能。当蛋白质被包埋在膜中时，它可填补由其他脂质种类的包装产生的间隙。聚乙二醇化胆固醇作为一种两亲性脂质衍生物，可用于制备脂质体和其他胶束作为药物传递系统。诸如琥珀酰亚胺基NHS酯的官能团将在胶束或脂质体表面上结合包括蛋白质、抗体和染料在内的含胺部分。

Properties

Molecular weight: MW of PEG was measured by MALDI-MS or GPC. PDI (polydispersity index) of our linear PEG is 1.02-1.05 with very narrow MW distribution. The number of repeating ethylene oxide units (CH2CH2O) or the degree of polymerization is calculated dividing the PEG MW by 44 (44 is the molecular mass of one repeating unit).

Solubility: Soluble in water and aqueous buffer, chloroform, methylene chloride, DMF, DMSO, and less soluble in alcohol, toluene. Not soluble in ether.

Density: PEG density is approximately 1.125 g/mL

Physical form: PEG products generally appear as white or off-white powder, and for very low MW linear PEG such as MW 1k or less, it may appear as wax-like, semi-solid material due to the low MW and the type of functional groups.

Storage condition: PEG product shall be stored in the original form as received in a freezer at -20C or lower for long term storage. Stock solution of PEG reagents that do not contain oxygen or moisture sensitive functional groups may be temporarily stored in a refrigerator or ambient temperature for multiple days. Stock solution should avoid repeated freeze-and-thaw cycles. See Documents section for detailed storage and handling conditions.

References

1.. Polymer stealthing and mucin-1 retargeting for enhanced pharmacokinetics of an oncolytic vaccinia virus, Molecular Therapy: Oncolytics, Vol. 21 June 2021, Text.

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