Anti-CalS7 antibodies enable researchers to detect and measure the CalS7 antigen in biological samples. This target is a reported synonym of the NIF3L1 gene, which encodes NGG1 interacting factor 3 like 1. This protein is known to function in the regulation of transcription and the regulation of cell differentiation, among other biological roles. The human version of CalS7 has a canonical amino acid length of 377 residues and a protein mass of 42 kilodaltons, although 3 isoforms have been identified. It is reported to be localized in the nucleus and cytoplasm of cells and widely expressed in many tissue types. CalS7 is a member of the GTP cyclohydrolase I type 2/NIF3 protein family.