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