Posttranslational modification of human CK1δ. Identified posttranslational modifications of CK1δ TV1 are indicated at their reported positions. Because most modifications have been reported for the C-terminal domain, this domain is depictured in a stretched presentation compared to the kinase domain. In the case of phosphorylation the distinction is made between reports of low-throughput studies and high-throughput studies. The figure was created based on information provided for CK1δ by PhosphoSitePlus® (Hornbeck et al., 2015). HTP, high-throughput studies, LTP, low-throughput studies, TV, transcription variant.