Proton fraction (top panel) and fraction of nucleons in nuclei (bottom panel) for accreting NS crust and catalysed NS crust (for the model based on the BSk19 EDF, thin solid line). Results are shown for the model of MB, and for the model based on the BSk19 EDF comparing two different treatments for the inner crust: ETFSI vs. ETF (no shell correction). For the ETF model in the top panel, results are shown only for the inner crust.