1. Interleukins are a group of cytokines ( secreted proteins and signal molecules ) that were first saw to be expressed by white blood cells ( leukocytes ) .
2. Interleukins are a group of cytokines ( expressed proteins and signal molecules ) that were first seen to be secreted by white blood cells ( leukocytes ) .

Select your answer from the options. Are these two sentences paraphrases of each other?
Choose your answer from:
(a). no.
(b). yes....I think the answer is
(a).