In this task, you are given a sentence. You are expected to recognize the name of any form of chemical substances. Although there might be several correct answers, you need to write one of them.
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Question: The Fer tyrosine kinase is important for platelet-derived growth factor-BB-induced Stat3 phosphorylation, colony formation in soft agar and tumor growth in vivo.

Answer: tyrosine


Question: The ATP required for potentiation of skeletal muscle contraction is released via pannexin hemichannels.

Answer: ATP


Question: Coming full circle: contributions of central and peripheral oxytocin actions to energy balance.

Answer:
oxytocin