levels of na , mg , p , s , cl , k , and ca were determined in cytoplasm ( endoplasmic reticulum ) , mitochondria , and extracellular matrix of the proliferative , prehypertrophic , and early hypertrophic zones of the growth plate and in the proximal , mid , and distal regions of the lesion .
C0010834
cytoplasm
C0014239
endoplasmic reticulum