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Table 1 In vitro virus neutralization exhibited by 7C8 Fab and 3C4 Fab fragments given as the concentration of Fab needed for IC80 neutralization.

From: HIV-2 neutralization by intact V3-specific Fab fragments

 

Virus

 

Fab Fragment

Isolate

Subtype

Coreceptor

usage+

TCID50

 

7C8

(μg/ml)

3C4

(μg/ml)

HIV-2SBL6669

A

CCR3, CXCR4

42

 

0.63

0.31

   

15

 

0.63

< 0.16

HIV-2K135

unknown

CCR5*

435^

 

-

6.25

   

18

 

0.63

0.31

HIV-21682

A

CCR1, CCR3, CCR5

28

 

-

6.25

HIV-21653

B

CCR5

18

 

-

6.25

HIV-22298

A

CCR5

18

 

-

12.50

SIVsm

n/a

CCR5, BOB

44

 

-

3.13

  1. + Co-receptor usage according to Mörner et al. [11] and Vödrös et al. [30].
  2. * Determined by Jose M. Marcelino (personal communication).
  3. n/a Not applicable.
  4. ^ Very high virus inoculum dose.
  5. - No neutralization observed up to 100 μg/ml.