A G-protein-coupled receptor kinase subtype that is primarily expressed in the TESTES and BRAIN. Variants of this subtype exist due to multiple alternative splicing of its mRNA.

Synonyms: GR4K-delta Kinase G Protein Coupled Receptor Kinase 4 G-Protein-Coupled Receptor Kinase 4 G-Protein-Coupled Receptor Kinase 4beta GR4K gamma Kinase GRK4-alpha Kinase G-Protein-Coupled Receptor Kinase 4delta EC 2.7.11.16 GRK4 alpha Kinase GR4K-gamma Kinase G Protein Coupled Receptor Kinase 4delta GR4K delta Kinase GRK4 beta Kinase GRK4C Kinase G Protein Coupled Receptor Kinase 4gamma G-Protein-Coupled Receptor Kinase 4gamma GR4KB Kinase G-Protein-Coupled Receptor Kinase 4alpha GRK4D Kinase GRK4A Kinase G Protein Coupled Receptor Kinase 4beta G Protein Coupled Receptor Kinase 4alpha GRK4 Kinase GRK4-beta Kinase