PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 8043581-17 1994 We conclude that phosphorylation of serine 120 by PKA is responsible for the reduction in affinity of the 61-kDa CaM-PDE for CaM. Serine 36-42 phosphodiesterase 1A Bos taurus 106-120