TASK DEFINITION: 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.
PROBLEM:  The level of expression of the PDE protein was monitored by immunoblot analysis using two specific cAMP - PDE polyclonal antibodies and by measuring the PDE activity .

SOLUTION: PDE protein

PROBLEM:  A V1 mutant generated in vivo with 11 of the 14 N - terminal amino acids altered , was viable and produced symptoms typical of a wild - type infection .

SOLUTION: V1 mutant

PROBLEM:  PCC 6803 mutant impaired in cytochrome c maturation .

SOLUTION:
cytochrome c