The function of DCP1B (decapping mRNA 1B, Ensembl gene identifier ENSG00000151065) is as follows. May play a role in the degradation of mRNAs, both in normal mRNA turnover and in nonsense-mediated mRNA decay. May remove the 7- methyl guanine cap structure from mRNA molecules, yielding a 5'- phosphorylated mRNA fragment and 7m-GDP (By similarity). .