noun, Biochemistry. 1. a pigment containing melanin, found in bird feathers. Origin of eumelanin. eu- + melanin.
1 In the United States, rapid-acting insulin, Lyspro (humalog) is mixed with NPH in a 50:50 (50% NPH and 50% insulin Lyspro) and 75:25 (75% NPH and 25% insulin Lyspro) ratio.  Insulin/Aspart (Novolog) combinations also are available as 70:30 mixtures (70% NPH, 30% insulin aspart).
Response From Expert. Insulin aspart (NovoLog, made by Novo Nordisk) and insulin lispro (Humalog, made by Eli Lilly) are rapid-acting insulin analogs indicated for treatment of type 1 and type 2 diabetes. Some institutions do substitute these agents for one another.