Table 1. Cyclin D1 protein level in untransfected or stably transfected immortalized fibroblasts.

	E	ST	SI
Immortalized fibroblasts	Cyclin D1 protein*
JunD-WTa	+	0	++
JunD-NULL-2a	++	+	+++
JunD-NULL-2-JD4a	++	0	0
JunD-NULL-2-JD7a	++	0	+
JunD-NULL-2-G42E-4a	++++	++++	++++
JunD-NULL-2-G42E-6a	++++	++++	++++
Men1-WT-10-V1bcd	+	+	++
Men1-WT-10-V2bcd	+	0	+
Men1-WT-10-JD4b	+	0	0
Men1-WT-10-JC4b	++++	+++	++++
Men1-NULL-17-V1c	+++	+	+++
Men1-NULL-17-V2c	++	0	+++
Men1-NULL-17-V3c	++	0	+++
Men1-NULL-17-JD4c	++	0	++
Men1-NULL-17-JD5c	++	0	++
Men1-NULL-17-JD6c	+++	0	+++
Men1-NULL-41-V1d	++	++	++
Men1-NULL-41-V2d	++	++	++
Men1-NULL-41-V3d	+++	+++	+++
Men1-NULL-41-JD3d	++	++	++
Men1-NULL-41-JD4d	++	++	++
Men1-NULL-41-JD5d	+++	+++	+++

^*Cyclin D1 level determined by Western blot of cells growing exponentially (E), serum-starved (ST), or serum-induced (SI). Superior letters represent groups compared within an experiment. +, cyclin D1 level (+, lowest; ++++, highest); 0 not detectable.