GO:0032259 methylation AnnotationPropagation P GO:0046539 histamine N-methyltransferase activity IDA GO:0005623 cell AnnotationPropagation C GO:0042147 retrograde transport, endosome to Golgi ISS GO:0005829 cytosol AnnotationPropagation C GO:0042147 retrograde transport, endosome to Golgi ISS