metabolism of, in man, [103]

of muscle contraction, [121]

origin of, in fasting, [81]

output, in man, [103]

produced by man, [106]

proteid as source of, [122], [123], [124], [129]

proteid as source of, in fasting, [81]

source of, in body, [21], [121]

source of, during fasting, in work, [125]

Enterokinase, [33]