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.

Q:  Intrathecal injections of small volumes of the alpha 2 - adrenoceptor agonists , xylazine and clonidine , into the cervical region of the spinal cord of conscious unrestrained sheep produced a dose - dependent analgesia of the forelimbs as measured using a mechanical pressure device .

A: alpha 2
****
Q:  Furthermore , the data suggest an immunological non - responsiveness to enterotoxin A in a considerable portion of the patients .

A: enterotoxin A
****
Q:  Sequence analysis revealed 100 % homology of all RA - derived PTEN fragments to those from normal SF as well as to the published GenBank sequence ( accession number U93051 ) .

A:
PTEN fragments
****