The two CRYs of the butterfly

  title={The two CRYs of the butterfly},
  author={Haisun Zhu and Quan Yuan and Oren Froy and Amy L Casselman and Steven M. Reppert},
  journal={Current Biology},
Animal flavoproteins called cryptochromes (CRYs) are generally believed to have distinct circadian clock functions in insects and mammals: Drosophila has one CRY (dCRY) which functions primarily as a blue-light photoreceptor [1], whereas mouse has two CRYs, mCRY1 and mCRY2, which while not directly photoreceptive, are potent transcriptional repressors acting within the clockwork itself [2]. We have discovered that the monarch butterfly, Danaus plexippus, has two cry genes: one encodes a flylike… CONTINUE READING

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