2485
The noticeable characteristic that distinguished the different classes was their size ( molecular weight ) differences and domain structure : Class I ( P - I ) , the small SVMPs , have molecular masses of 20 - 30 kDa , contain only a pro domain and the proteinase domain ; Class II ( P - II ) , the medium size SVMPs , molecular masses of 30 - 60 kDa , contain the pro domain , proteinase domain and disintegrin domain ; Class III ( P - III ) , the large SVMPs , have molecular masses of 60 - 100 kDa , contain pro , proteinase , disintegrin - like and cysteine - rich domain structure .
 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: cysteine