AHCY and hereditary elliptocytosis: Within the cysteine and methionine metabolism pathway, two genes EC 2.3.1.31 (homoserine O-acetyltransferase) and EC 3.3.1.1 (adenosylhomocysteinase) were higher in HE cows, while EC 2.1.1.14 (5-methyltetrahydropteroyltriglutamat-homocysteine S-methyltransferase) exhibited enrichment in LE cows (P < 0.01).