FOS Oncoprotein

Definition 1

c-FOS protein is a transcription factor critical in regulating the development of the skeleton. c-FOS protein is a major component of the DNA-binding AP-1 transcription complex, which also includes members of the JUN family. Each protein contains a bZIP domain and a leucine zipper domain. FOS oncoproteins derive from mutated FOS genes. These proteins have been found in the Finkel-Biskis-Jinkins (FBJ-MSV) and Finkel-Biskis-Reilly (FBR-MSV) murine sarcoma viruses, which induce osteogenic sarcomas in mice. The FBJ-MSV v-fos gene encodes a 55 kD protein and the FBR-MSV v-fos gene encodes a 75 kD fusion protein. (from OMIM 164810 and NCI) (NCI Thesaurus)

Definition 2

Transforming proteins coded by fos oncogenes. These proteins have been found in the Finkel-Biskis-Jinkins (FBJ-MSV) and Finkel-Biskis-Reilly (FBR-MSV) murine sarcoma viruses which induce osteogenic sarcomas in mice. The FBJ-MSV v-fos gene encodes a p55 kD protein and the FBR-MSV v-fos gene encodes a p75 kD fusion protein. (NLM, Medical Subject Headings)

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Forward

At or near or directed toward the front.

Forty Nine

A natural number greater than forty-eight and less than fifty and the quantity that it denotes.

Forty

A natural number greater than thirty-nine and less than forty-one and the quantity that it denotes.