Store › SiR700-actin kit 35 nmol Image 1 of 1 SiR700-actin kit 35 nmol $1,184.00 Quantity: Add To Cart Added! SiR700-actin is a far-red, fluorogenic, cell permeable and highly specific probe for F-actin. SiR700-actin is a far-red, fluorogenic, cell permeable and highly specific probe for F-actin.