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.

Example Input: Interestingly , these " activation - defective " mutants segregated into two classes : 1 ) those that were unable to form dimers but that could still form higher order oligomers and transform cells , and 2 ) those that were defective for PDGF - R binding and were transformation - incompetent .
Example Output: PDGF - R

Example Input: The vaccine was highly immunogenic , since 111 of 113 patients ( 98 % ) produced anti - HBs ( 10 mIU / ml or more ) .
Example Output: anti - HBs

Example Input: Hetero - oligomerization of Smad4 with the pathway - restricted SMAD proteins is essential for Smad4 - mediated transcription .
Example Output:
SMAD proteins