COUP-TF interacting protein 1 (CTIP1) is a novel C2H2 zinc finger protein that mediates transcriptional repression of ARP1, a member of the COUP-TF subfamily of orphan nuclear receptors [1]. Here we show that CTIP1 inter ...

This work sets forth a reformulation of Levins' loop analysis for the qualitative modeling of complex dynamical systems. Relationships between members of ecological communities can be analyzed through a qualitatively s ...