英语语法分析

Results Immuno-fluorescent staining presented the discontinuous punctiform or linear expression of HCN2 in cardiomyocytes membrane, but not for HCN4.

结果免疫荧光结果显示HCN2在心室肌细胞膜上呈点状或短线状不连续表达；HCN4未见表达。