Ready-to-use ELISA kits are available for the detection of basic helix-loop-helix family, member e23, an alias of the protein, basic helix-loop-helix family member e23. The official gene symbol is BHLHE23. The protein, with a mass of 23.7 kDa and length of 225 residues, is reported to be nuclear. It may be known by other names, including: bA305P22.3, Beta3b, BETA4, class B basic helix-loop-helix protein 4, basic helix-loop-helix domain containing class B 4, and class E basic helix-loop-helix protein 23.