Ƙirƙirar wani nau'i mai mahimmanci na wannan jumla NPAS2 yana da kama da CLOCK, kuma duka su ne manyan sunadarai da ke cikin kiyayewa na rhythms na circadian a cikin dabbobi masu shayarwa.
Tabbas, mafi rikitarwa na jumla ita ce "NPAS2 daidai yake da CLOCK, wani muhimmin furotin da ke cikin kiyayewa na yanayin circadian a cikin dabbobi masu shayarwa, kuma ana tunanin rawar da yake takawa a cikin kwakwalwa a matsayin mai samarwa da mai kula da yanayin circadian na dabbobi masu shayarwa. "