Inside the bacterial cell, amino acids are continually recycled. Go to the end of the line. Plant Protein 6a, 6b. You've just been ingested by some kind of animal. The plant in which you reside has just died.
Microorganisms decompose the plant protein into amino acids and can liberate ammonium.
Inside the plant cell, amino acids are continually recycled. Animal Protein 7a. Animal cell metabolism has converted you into urine. The animal in which you reside has either died or defecated. Soil microorganisms decompose proteins into amino acids, sometimes liberating ammonium.