8866
However , it is only one - half and one - third the size of the proteolipids from M . thermoautotrophicum and M . jannaschii , respectively . ahaK is expressed in Escherichia coli , and it is incorporated into the cytoplasmic membrane despite the different chemical natures of lipids from archaea and bacteria .
 GENE: ahaK
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
 Entities: ahaK 
Answer:
 GENE: ahaK