Polyethylene Glycol (PEGs & PEOs)

t-butyl ester-PEG5-CH2COOH is a PEG derivative containing a t-butyl protected carboxyl group with a terminal carboxylic acid. The terminal carboxylic acid can be reacted with primary amine groups in the presence of activators (e.g. EDC, or DCC) to

t-butyl-octadecanedioate-NHS ester has a t-butyl ester group and an NHS ester moiety. The t-butyl group can be deprotected under acidic conditions. NHS ester can react specifically and efficiently with primary amines such as the side chain of lysine

t-butyl-octadecanedioate-NHS ester has a t-butyl ester group and an NHS ester moiety. The t-butyl group can be deprotected under acidic conditions. NHS ester can react specifically and efficiently with primary amines such as the side chain of lysine

t-butyl-octadecanedioate-NHS ester has a t-butyl ester group and an NHS ester moiety. The t-butyl group can be deprotected under acidic conditions. NHS ester can react specifically and efficiently with primary amines such as the side chain of lysine

t-Butyloxycarbonyl-PEG4-Sulfone-PEG4-t-butyl ester is a PEG derivative containing two t-butyl protecting groups. The t-butyl protecting groups can be removed under acidic conditions. The sulfone group can be conjugated with thiol groups of proteins.

t-Butyloxycarbonyl-PEG4-Sulfone-PEG4-t-butyl ester is a PEG derivative containing two t-butyl protecting groups. The t-butyl protecting groups can be removed under acidic conditions. The sulfone group can be conjugated with thiol groups of proteins.

t-Butyloxycarbonyl-PEG4-Sulfone-PEG4-t-butyl ester is a PEG derivative containing two t-butyl protecting groups. The t-butyl protecting groups can be removed under acidic conditions. The sulfone group can be conjugated with thiol groups of proteins.

t-butyoxycarboxy-PEG4-phosphonic acid ethyl ester contains a t-Boc protecting group and a phosphonic acid ethyl ester moiety. The t-butyl group is removed under acidic conditions. The hydrophilic PEG spacer increases solubility in aqueous media.

t-butyoxycarboxy-PEG4-phosphonic acid ethyl ester contains a t-Boc protecting group and a phosphonic acid ethyl ester moiety. The t-butyl group is removed under acidic conditions. The hydrophilic PEG spacer increases solubility in aqueous media.

t-butyoxycarboxy-PEG4-phosphonic acid ethyl ester contains a t-Boc protecting group and a phosphonic acid ethyl ester moiety. The t-butyl group is removed under acidic conditions. The hydrophilic PEG spacer increases solubility in aqueous media.

TAMRA-PEG3-biotin is a TAMRA dye derivative containing an azide group, which enables Click Chemistry-mediated labeling of alkyne-tagged proteins. The hydrophilic PEG spacer increases solubility in aqueous media.

TAMRA-PEG3-biotin is a TAMRA dye derivative containing an azide group, which enables Click Chemistry-mediated labeling of alkyne-tagged proteins. The hydrophilic PEG spacer increases solubility in aqueous media.