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: Detailed comparison of the sequences of cp35 and human calpactin II shows that the only substantial sequence dissimilarity is a domain encoding amino acids between residues 20 and 40 which includes a tyrosine phosphorylation site in the human molecule , along with other residues of possible physiological significance .
Example Output: human calpactin II

Example Input: To further identify the residues responsible for the activity , we isolated the mutant viruses that were not neutralized with the soluble form of MHV receptor proteins , since such mutants were expected to have mutations in amino acids responsible for receptor - binding activity .
Example Output: MHV receptor proteins

Example Input: We have isolated a unique murine FLT3 cDNA that codes for a variant isoform of FLT3 , devoid of the fifth Ig - like domain , by comparison with the prototypic form .
Example Output:
murine FLT3 cDNA