Potassium large conductance calcium-activated channel, subfamily M, beta member 2, or Potassium channel subfamily M regulatory beta subunit 2, is a human gene encoded by KCNMB2. It may also be known as: Calcium-activated potassium channel subunit beta-2; BK channel subunit beta-2; BKbeta2; Hbeta2; Calcium-activated potassium channel, subfamily M subunit beta-2; Charybdotoxin receptor subunit beta-2; K(VCA)beta-2; Maxi K channel subunit beta-2; Slo-beta-2; BK channel beta subunit 2; MaxiK channel beta-subunit 2; big potassium channel beta subunit 2. The encoded protein has an amino acid length of 235 and a mass of 27.1 kDa. Other isoforms may exist. Potassium large conductance calcium-activated channel, subfamily M, beta member 2 is a member of the KCNMB (TC 8.A.14.1) family, KCNMB2 subfamily. Homologs of this gene exist in other organisms, including: Mouse, Zebrafish.