4644
Addition of soluble recombinant human SLF to SI4 - h220 cultures enhanced reduction of cell - surface c - kit expression and its protein degradation .
 GENE: recombinant human SLF; GENE: c - kit
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: recombinant human SLF, c - kit 
Answer:
 GENE: recombinant human SLF; GENE: c - kit