Immunological characteristics of human ferritins; consequences for human serum ferritin determination.

Standard curves established with human spleen, liver, placenta and heart ferritins for eight commercial radioimmunological procedures show that liver and spleen ferritins present almost identical responses, whereas three times as much placenta ferritin and six times as much heart ferritin were required to give the same response as liver and spleen ferritins. There are great variations between the kits in the estimation of the ferritin level of a control serum.