Fill in the blank in the following paragraph.
"Cytosolic Ca²⁺ can be sensed by ..., a small, conserved, dumbbell-shaped protein with four Ca²⁺-binding sites. Upon Ca²⁺ binding, it binds and activates dozens of proteins by changing its conformation in different ways."

Question

Fill in the blank in the following paragraph."Cytosolic Ca2+ can be sensed by ..., a small, conserved, dumbbell-shaped protein with four Ca2+-binding sites. Upon Ca2+ binding, it binds and activates dozens of proteins by changing its conformation in different ways."

Fill in the blank in the following paragraph.
"Cytosolic Ca²⁺ can be sensed by ..., a small, conserved, dumbbell-shaped protein with four Ca²⁺-binding sites. Upon Ca²⁺ binding, it binds and activates dozens of proteins by changing its conformation in different ways."