This chemical is not a standard compound and appears to be a misnomer or incorrectly formatted designation. CD38 is a cell surface enzyme involved in immune regulation, and HEK293 refers to a human embryonic kidney cell line commonly used in biomedical research. "maca" may be a typographical error or misinterpretation. If referring to a recombinant protein, antibody, or engineered molecule involving CD38 expressed in HEK293 cells, such constructs are typically used in research settings for studying protein function, antibody development, or drug screening. Applications may include cancer immunotherapy research (as CD38 is a target in multiple myeloma), development of diagnostic tools, or production of biologics using mammalian expression systems. Clarification of the intended molecule is recommended for precise application details.