D-Biotin-N-hydroxysuccinimide ester crystalline powder D-Biotinoyl-ε-aminocaproic acid-N-hydroxysuccinimide ester powder Streptavidin R-Phycoerythrin LumiGrade Reagent solution Streptavidin R-Phycoerythrin LumiGrade Ultrasensitive Reagent solution