In this task, you are given a sentence. You are expected to write the name of the organism substances in the body mentioned in the input. Although there might be several correct answers, you need to write one of them.

[EX Q]:  The proteins responsible for a majority of the higher binding were identified as immunoglobulins , based on their elution from gel filtration columns and the removal of 57 - 88 % of the non - albumin binding by treating of plasma with Protein A - agarose .
[EX A]: plasma

[EX Q]:  Iliac crest biopsy samples were taken and bone histomorphometry carried out .
[EX A]: samples

[EX Q]:  Among adolescent boys in Chapaevsk , Russia , higher serum levels of sum of dioxin - like compounds and sum of dioxin TEQs were positively associated with increased age , consumption of fish , local meats other than chicken , and inversely with weeks of gestation .
[EX A]:
serum