tissue protein content was measured on the subsequent days of gestation ( days 20-22 ) , and protein synthesis was determined at day 20 of gestation in fetal tissues after intravenous injection of [ 3h ] phenylalanine into the maternal circulation , followed by measurements of tissue free and protein-bound phenylalanine specific radioactivity in fetal diaphragm , brain , heart , and liver .
C0423896
content
C0006104
brain