instruction:
In this task, you are given a sentence. You are expected to recognize the name of gene or protein. Although there might be several correct answers, you need to write one of them.
question:
Yohimbine dimers exhibiting selectivity for the human alpha 2C-adrenoceptor subtype.
answer:
human alpha 2C-adrenoceptor


question:
Crystal structure of serine dehydratase from rat liver.
answer:
serine dehydratase


question:
An analysis of skeletal development in osteoblast- and chondrocyte-specific Runx2 knockout mice.
answer:

Runx2