APOBEC3H and cancer: Even though A3A mRNA expression is lower than A3B and A3H Hap I, low A3A mRNA that provides robust protein levels has been observed in cancer cells; mRNA expression and steady-state protein levels are often not correlated, and importantly, the steady-state protein levels of A3A, A3B, and A3H Hap I are regardless similar in the MCF10A or MCF7 cells (Figures 1B,C) (de Sousa Abreu et al., 2009; Vogel and Marcotte, 2012; Cortez et al., 2019; Jalili et al., 2020; Petljak et al., 2022).