(A) Namalwa cells ectopically expressing either Syndecan 1 or 4 were exposed to either SARS-CoV-2 pseudovirus alone or SARS-Cov-2 pseudovirus pre-treated with UF heparin (250 IU/mL) or LMWH enoxaparin (250 IU/mL) for 30 min at 37°C. Binding was measured after 4 hours at 4°C by ELISA. (B) SARS-CoV-2 isolate (hCoV-19/Italy) was pre-incubated with LMWH enoxaparin (250 IU/mL) for 30 min at 37°C. Namalwa cells expressing Syndecan 1 and 4 were exposed to either SARS-CoV-2 isolate (100 TCID/mL) or SARS-CoV-2 isolate (100 TCID/mL) pre-treated with LMWH LMWH enoxaparin (250 IU/mL) for 4 hours at 4°C and binding was determined by quantitative real-time PCR. Data show the mean values and error bars are the SEM. Statistical analysis was performed using (A) 2way-ANOVA with Dunnett's multiple-comparison test. *P≤0.05, **P≤0.01 (n = 7), (B) 2way-ANOVA with Sidak's multiple-comparison test. *P≤0.05, **P≤0.01, ***P≤0.001, ****P≤0.0001 (n = 3 measured in triplicate). 