25683
Diabetic STZ and Iddm rats , as well as insulin - substituted Iddm rats , exhibited a significant diurnal expression pattern of clock genes as determined by Cosinor analysis ; however , the MESOR ( midline estimating statistic of rhythm ) of Bmal1 , Per2 , and Clock transcript expression was altered in Iddm and insulin - substituted Iddm rats .
 Chemical: STZ
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: STZ