Antibody:	Anti-Atrial Natriuretic Peptide Antibody, clone A6 (CBL66)
Detection system:	Secondary antibody coupled to Alexa Fluor 555

Structure	Level	Pattern	Image	Note
TS19: left ventricle cardiac muscle	Present	Regionally restricted	1D , 1B	The percentage of positive cells was 8.4-fold higher in the trabecular myocardium compared to the compact myocardium (64% vs. 7.6%, summarized in Fig 1H).

Structure	Level	Pattern	Image	Note
TS19: left ventricle cardiac muscle	Present		1L , 1N	Coexpressed with Gja5 in many cell clusters in the trabecular myocardium.

Structure	Level	Pattern	Image	Note
TS19: ventricle cardiac muscle	Present		3B , 3C	Costained with lipid droplets dye (BODIPY) in the trabecular myocardium.

Structure	Level	Pattern	Image	Note
TS19: right ventricle cardiac muscle	Present		S1D , S1C	The percentage of positive cells was significant higher in the trabecular myocardium compared to the compact myocardium.
TS19: interventricular septum cardiac muscle	Present		S1C , S1D	The percentage of positive cells was significant higher compared to the compact myocardium.