Ready-to-use ELISA kits are available for the detection of BCLXL, an alias of the protein, BCL2 like 1. The official gene symbol is BCL2L1. The kits can detect several species variants of the protein, including: human, mouse, rat, bovine, chicken, primate, guinea pig, and other mammalian. The protein, with a mass of 26 kDa and length of 233 residues, is reported to be cytoplasmic, nuclear and mitochondrial. It is a member of the Bcl-2 family and may be known by other names, including: Bcl-X, BCLX, BCL-XL/S, protein phosphatase 1 regulatory subunit 52, apoptosis regulator Bcl-X, and bcl-2-like protein 1.