4495
These results suggest that cell viability of TAMR - MCF - 7 cells is affected by inhibition of sulfur amino acid metabolism , particularly cysteine synthesis from homocysteine and GSH synthesis from cysteine .
 Chemical: sulfur; Chemical: amino acid; Chemical: cysteine; Chemical: homocysteine; Chemical: GSH; Chemical: cysteine
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: sulfur; Chemical: amino acid; Chemical: cysteine; Chemical: homocysteine; Chemical: GSH; Chemical: cysteine