ɪn pɹˈaɪmeɪts, ˈælfəlˈæktɐlbjˌuːmɪn ɛkspɹˈɛʃən ɪz ˈʌpɹɪɡjˌʊleɪɾᵻd ɪn ɹᵻspˈɑːns tə ðə hˈoːɹmoʊn pɹˈɑːlɐktˌɪn ænd ˈɪŋkɹiːsᵻz ðə pɹədˈʌkʃən ʌv lˈæktoʊs.
In primates, α-lactalbumin expression is upregulated in response to the hormone prolactin and increases the production of lactose.