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Mouse hippocampal synaptosomal plasmamembranes posses mGlu7 receptor proteins ; confocal microscopy analysis unveiled that mGlu7 proteins colocalize with syntaxin - 1A ( Stx - 1A ) , with vesicular GABA transporter ( VGAT ) - proteins and with GABA ( B ) receptor subunit proteins .
 Chemical: GABA; Chemical: GABA
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: GABA; Chemical: GABA