Any measurement involving the amount, composition or type of protein, the complex organic compounds containing carbon, hydrogen, oxygen, nitrogen, and sulfur consisting of alpha-amino acids joined by peptide linkages, in blood.
blood pyruvate level +
blood reactive oxygen metabolite level +
blood steroid level +
blood urea level +
blood urea nitrogen level +
blood uric acid level +
blood vitamin level +
blood xenobiotic measurement +
glomerular filtration rate +
plasma osmolality
serum derivatives of reactive oxygen metabolites level