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:  We report on a case of a 43 - old - male with a bronchogenic cyst in the distal esophagus , which was misdiagnosed as a malignant esophageal tumor based on preoperative imaging and high levels of the tumor markers CA 19 - 9 and CA 125 .

SOLUTION: CA 125

PROBLEM:  Analysis of 1 Mb of published sequence from the region of conserved synteny on human chromosome 5q31 - q33 identified 45 gene candidates , including 35 expressed genes in the human IL - 4 cytokine gene cluster .

SOLUTION: IL - 4

PROBLEM:  To elucidate the molecular mechanism by which the Ras signaling pathway activates a cell - type - specific gene , we have used the pituitary - specific rat prolactin ( rPRL ) promoter as a target of oncogenic Ras and Raf in GH4 rat pituitary cells .

SOLUTION:
oncogenic Ras