PLL(20)-g[3.5]- PEG(2)

PLL(20 kDa) grafted with PEG(2 kDa) and Atto633 g = 3.0 to 4.0 (Lys units /PEG chains) Atto633 labeling approx 2% Emission wave length max = 657 nm Very bright label with high photostability