Please check if these have the same meaning.
[A]. no
[B]. yes
Interleukins are a group of cytokines ( secreted proteins and signal molecules ) that were first saw to be expressed by white blood cells ( leukocytes ) .
Interleukins are a group of cytokines ( secreted proteins and signal molecules ) that were first seen to be expressed by white blood cells ( leukocytes ) .
[B].