Cat
Name
Size
Price
Action
MBS6394409-01
SLURP1 (Secreted Ly-6/uPAR-related Protein 1, SLURP-1, Anti-neoplastic Urinary Protein, ANUP, ARS Component B, ArsB, ARS(component B)-81/S, ARS, LY6LS, MDM) (PE)
0.1 mL
Ask
MBS6394409-02
SLURP1 (Secreted Ly-6/uPAR-related Protein 1, SLURP-1, Anti-neoplastic Urinary Protein, ANUP, ARS Component B, ArsB, ARS(component B)-81/S, ARS, LY6LS, MDM) (PE)
5x 0.1 mL
Ask
MBS6160369-01
SLURP1 (Secreted Ly-6/uPAR-related Protein 1, SLURP-1, Anti-neoplastic Urinary Protein, ANUP, ARS Component B, ArsB, ARS(component B)-81/S, ARS, LY6LS, MDM) (PE)
0.1 mL
Ask
MBS6160369-02
SLURP1 (Secreted Ly-6/uPAR-related Protein 1, SLURP-1, Anti-neoplastic Urinary Protein, ANUP, ARS Component B, ArsB, ARS(component B)-81/S, ARS, LY6LS, MDM) (PE)
5x 0.1 mL
Ask
FHN10212-01
Anti-Human Complement C5b-9 Complex Antibody (aE11#), PE
50 Tests
Ask
FHN10212-02
Anti-Human Complement C5b-9 Complex Antibody (aE11#), PE
100 Tests
Ask
MBS2127062-01
PE-Linked Anti-Major Histocompatibility Complex Class I C (MHCC) Polyclonal Antibody
0.2 mL
Ask
MBS2127062-02
PE-Linked Anti-Major Histocompatibility Complex Class I C (MHCC) Polyclonal Antibody
5x 0.2 mL
Ask
MBS2127066-01
PE-Linked Anti-Major Histocompatibility Complex Class I B (MHCB) Polyclonal Antibody
25 Tests
Ask
MBS2127066-02
PE-Linked Anti-Major Histocompatibility Complex Class I B (MHCB) Polyclonal Antibody
50 Tests
Ask
MBS2127066-03
PE-Linked Anti-Major Histocompatibility Complex Class I B (MHCB) Polyclonal Antibody
100 Tests
Ask
MBS2127066-04
PE-Linked Anti-Major Histocompatibility Complex Class I B (MHCB) Polyclonal Antibody
200 Tests
Ask
MBS2127066-05
PE-Linked Anti-Major Histocompatibility Complex Class I B (MHCB) Polyclonal Antibody
500 Tests
Ask
MBS2127066-06
PE-Linked Anti-Major Histocompatibility Complex Class I B (MHCB) Polyclonal Antibody
5x 500 Tests
Ask
FAC092Hu41-01
PE-Linked Anti-Major Histocompatibility Complex Class I B (MHCB) Polyclonal Antibody
50 Tests
Ask
FAC092Hu41-02
PE-Linked Anti-Major Histocompatibility Complex Class I B (MHCB) Polyclonal Antibody
100 Tests
Ask
FAC092Hu41-03
PE-Linked Anti-Major Histocompatibility Complex Class I B (MHCB) Polyclonal Antibody
200 Tests
Ask
FHD96712-01
Anti-Human IL4 receptor complex Antibody (A2), PE
50 Tests
Ask
FHD96712-02
Anti-Human IL4 receptor complex Antibody (A2), PE
100 Tests
Ask
MBS520719-01
Anti-Human Complement Factor B/Bb, PE (clone: M13/12), (Mouse IgG1 K)
0.05 mg
Ask
MBS520719-02
Anti-Human Complement Factor B/Bb, PE (clone: M13/12), (Mouse IgG1 K)
5x 0.05 mg
Ask
MBS520714-01
Anti-Human Complement Factor B/Ba, PE (clone: P21/15), (Mouse IgG2a K)
0.05 mg
Ask
MBS520714-02
Anti-Human Complement Factor B/Ba, PE (clone: P21/15), (Mouse IgG2a K)
5x 0.05 mg
Ask
1P-932-T100
Anti-Hu SIGLEC10 PE
100 Tests
Ask
E16FHP301-025
PE anti-human CD301 (CLEC10A)
25 tests
Ask
E16FHP301-100
PE anti-human CD301 (CLEC10A)
100 tests
Ask
FHJ40412-01
Anti-Human SIGLEC10/SLG2 Antibody (S10-A), PE
50 Tests
Ask
FHJ40412-02
Anti-Human SIGLEC10/SLG2 Antibody (S10-A), PE
100 Tests
Ask
FHJ18312-01
Anti-Human CD301/CLEC10A Antibody (49C11), PE
50 Tests
Ask
FHJ18312-02
Anti-Human CD301/CLEC10A Antibody (49C11), PE
100 Tests
Ask
MBS2127074-01
PE-Linked Anti-HLA Class II Histocompatibility Antigen, DRB1 Beta Chain (HLA-DRB1) Polyclonal Antibody
0.2 mL
Ask
MBS2127074-02
PE-Linked Anti-HLA Class II Histocompatibility Antigen, DRB1 Beta Chain (HLA-DRB1) Polyclonal Antibody
5x 0.2 mL
Ask
MBS2127070-01
PE-Linked Anti-HLA Class II Histocompatibility Antigen, DR Alpha Chain (HLA-DRA) Polyclonal Antibody
25 Tests
Ask
MBS2127070-02
PE-Linked Anti-HLA Class II Histocompatibility Antigen, DR Alpha Chain (HLA-DRA) Polyclonal Antibody
50 Tests
Ask
MBS2127070-03
PE-Linked Anti-HLA Class II Histocompatibility Antigen, DR Alpha Chain (HLA-DRA) Polyclonal Antibody
100 Tests
Ask
MBS2127070-04
PE-Linked Anti-HLA Class II Histocompatibility Antigen, DR Alpha Chain (HLA-DRA) Polyclonal Antibody
200 Tests
Ask
MBS2127070-05
PE-Linked Anti-HLA Class II Histocompatibility Antigen, DR Alpha Chain (HLA-DRA) Polyclonal Antibody
500 Tests
Ask
MBS2127070-06
PE-Linked Anti-HLA Class II Histocompatibility Antigen, DR Alpha Chain (HLA-DRA) Polyclonal Antibody
5x 500 Tests
Ask
FAC166Hu41-01
PE-Linked Anti-HLA Class II Histocompatibility Antigen, DR Alpha Chain (HLA-DRA) Polyclonal Antibody
50 Tests
Ask
FAC166Hu41-02
PE-Linked Anti-HLA Class II Histocompatibility Antigen, DR Alpha Chain (HLA-DRA) Polyclonal Antibody
100 Tests
Ask
FAC166Hu41-03
PE-Linked Anti-HLA Class II Histocompatibility Antigen, DR Alpha Chain (HLA-DRA) Polyclonal Antibody
200 Tests
Ask
IRTAMSCD38NIMR5CPE25UG
Anti Mouse CD38 Flow Cytometry Monoclonal Clone NIMR5 PE 25ug
25 µg
Ask
IHMAAMSCD11CN418CPE25UG
Anti Mouse CD11c Flow Cytometry Monoclonal Clone N418 PE 25ug
25 µg
Ask
IRTAMSCD38NIMR5CPE100UG
Anti Mouse CD38 Flow Cytometry Monoclonal Clone NIMR5 PE 100ug
100 µg
Ask
IHMAAMSCD11CN418CPE100UG
Anti Mouse CD11c Flow Cytometry Monoclonal Clone N418 PE 100ug
100 µg
Ask
IRTAMSCD38NIMR5CPECY725UG
Anti Mouse CD38 Flow Cytometry Monoclonal Clone NIMR5 PE/Cyanine7 25ug
25 µg
Ask
IHMAAMSCD11CN418CPECY725UG
Anti Mouse CD11c Flow Cytometry Monoclonal Clone N418 PE/Cyanine7 25ug
25 µg
Ask
IHMAAMSCD11CN418CPECY525UG
Anti Mouse CD11c Flow Cytometry Monoclonal Clone N418 PE/Cyanine5 25ug
25 µg
Ask
MBS520684-01
Anti-rat IgG2b (clone: NORIG 7.16.2), PE, (Mouse IgG1 k)
0.05 mg
Ask
MBS520684-02
Anti-rat IgG2b (clone: NORIG 7.16.2), PE, (Mouse IgG1 k)
5x 0.05 mg
Ask
FHK34212-01
Anti-Human ENTPD2/CD39L1 Antibody (SAA0771), PE
50 Tests
Ask
FHK34212-02
Anti-Human ENTPD2/CD39L1 Antibody (SAA0771), PE
100 Tests
Ask
IHMAAMSCD11CN418CPECY7100UG
Anti Mouse CD11c Flow Cytometry Monoclonal Clone N418 PE/Cyanine7 100ug
100 µg
Ask
IRTAMSCD38NIMR5CPECY7100UG
Anti Mouse CD38 Flow Cytometry Monoclonal Clone NIMR5 PE/Cyanine7 100ug
100 µg
Ask
IHMAAMSCD11CN418CPECY55100UG
Anti Mouse CD11c Flow Cytometry Monoclonal Clone N418 PE/Cyanine5.5 100ug
100 µg
Ask
IHMAAMSCD11CN418CPECY5525UG
Anti Mouse CD11c Flow Cytometry Monoclonal Clone N418 PE/Cyanine5.5 25ug
25 µg
Ask
DCABH-7498
Anti-NCAM1 monoclonal antibody, clone NFN-299 [PE]
100 tests
Ask
MBS520532-01
Anti-Mouse CD34, PE (Clone MEC14.7) (rat IgG2a)
0.05 mg
Ask
MBS520532-02
Anti-Mouse CD34, PE (Clone MEC14.7) (rat IgG2a)
0.3 mg
Ask
MBS520532-03
Anti-Mouse CD34, PE (Clone MEC14.7) (rat IgG2a)
5x 0.3 mg
Ask
MCD034-PE
Anti-Mouse CD34, PE (Clone MEC14.7) (rat IgG2a)
100 Tests
Ask
IHMAAMSCD11CN418CPECY5100UG
Anti Mouse CD11c Flow Cytometry Monoclonal Clone N418 PE/Cyanine5 100ug
100 µg
Ask
IRTAMSCD38NIMR5CPE100
Anti Mouse CD38 Flow Cytometry Monoclonal Clone NIMR5 PE Ready To Use 100 Tests
100 Tests
Ask
IHMAAMSCD11CN418CPE100
Anti Mouse CD11c Flow Cytometry Monoclonal Clone N418 PE Ready To Use 100 Tests
100 Tests
Ask
IHMAAMSCD11CN418CPE200
Anti Mouse CD11c Flow Cytometry Monoclonal Clone N418 PE Ready To Use 200 Tests
200 Tests
Ask
IRTAMSCD38NIMR5CPE200
Anti Mouse CD38 Flow Cytometry Monoclonal Clone NIMR5 PE Ready To Use 200 Tests
200 Tests
Ask
E16FMP169-100U
PE anti-mouse CD169 (Siglec-1)
100 μg
Ask
E16FMP169-025U
PE anti-mouse CD169 (Siglec-1)
25 μg
Ask
E16FMN169-100U
PE-Cy7 anti-mouse CD169 (Siglec-1)
100 μg
Ask
E16FMN169-025U
PE-Cy7 anti-mouse CD169 (Siglec-1)
25 μg
Ask
IHMAAMSCD11CN418CPECY55200
Anti Mouse CD11c Flow Cytometry Monoclonal Clone N418 PE/Cyanine5.5 Ready To Use 200 Tests
200 Tests
Ask
IRTAMSCD38NIMR5CPECY7100
Anti Mouse CD38 Flow Cytometry Monoclonal Clone NIMR5 PE/Cyanine7 Ready To Use 100 Tests
100 Tests
Ask
IHMAAMSCD11CN418CPECY7200
Anti Mouse CD11c Flow Cytometry Monoclonal Clone N418 PE/Cyanine7 Ready To Use 200 Tests
200 Tests
Ask
IHMAAMSCD11CN418CPECY5100
Anti Mouse CD11c Flow Cytometry Monoclonal Clone N418 PE/Cyanine5 Ready To Use 100 Tests
100 Tests
Ask
IHMAAMSCD11CN418CPECY7100
Anti Mouse CD11c Flow Cytometry Monoclonal Clone N418 PE/Cyanine7 Ready To Use 100 Tests
100 Tests
Ask
IHMAAMSCD11CN418CPECY5200
Anti Mouse CD11c Flow Cytometry Monoclonal Clone N418 PE/Cyanine5 Ready To Use 200 Tests
200 Tests
Ask
IRTAMSCD38NIMR5CPECY7200
Anti Mouse CD38 Flow Cytometry Monoclonal Clone NIMR5 PE/Cyanine7 Ready To Use 200 Tests
200 Tests
Ask
IHMAAMSCD11CN418CPECY55100
Anti Mouse CD11c Flow Cytometry Monoclonal Clone N418 PE/Cyanine5.5 Ready To Use 100 Tests
100 Tests
Ask
S0B4055-01
Goat Anti-Human IgG, Fcγ Fragment Specific (min X Bov, Ms, Rat Sr Prot) (PE Conjugate)
1 mg
Ask
S0B4055-02
Goat Anti-Human IgG, Fcγ Fragment Specific (min X Bov, Ms, Rat Sr Prot) (PE Conjugate)
0.5 mg
Ask
S0B4055-03
Goat Anti-Human IgG, Fcγ Fragment Specific (min X Bov, Ms, Rat Sr Prot) (PE Conjugate)
2 mg
Ask
E16FMP132-050U
PE anti-mouse CD132 (common γ chain)
50 μg
Ask
E16FMP132-200U
PE anti-mouse CD132 (common γ chain)
200 μg
Ask
GM-4193
Mouse anti Myeloperoxidase-C2 (MPO-C2), conjugated to PE
2 mL (100 Tests)
Ask
GM-4193-CE/IVD
Mouse anti Myeloperoxidase-C2 (MPO-C2), conjugated to PE
2 mL (100 Tests)
Ask
GIC-213
COMBI IC Reagent: Mouse anti Myeloperoxidase-C2 (FITC) and Mouse anti CD3 (PE)
1 mL
Ask
GIC-213-CE/IVD
COMBI IC Reagent: Mouse anti Myeloperoxidase-C2 (FITC) and Mouse anti CD3 (PE)
1 mL
Ask
MBS570348-01
COMBI IC Reagent: Mouse anti Myeloperoxidase-C2 (FITC) and Mouse anti CD22 (PE)
1 mL
Ask
MBS570348-02
COMBI IC Reagent: Mouse anti Myeloperoxidase-C2 (FITC) and Mouse anti CD22 (PE)
5x 1 mL
Ask
MPOPE-100T
PE Anti-Human MPO
100 Tests
Ask
GIC-214-CE/IVD
COMBI IC Reagent: Mouse anti Myeloperoxidase-C2 (FITC) and Mouse anti CD22 (PE)
1 mL
Ask
MBS570355-01
COMBI IC Reagent: Mouse anti Myeloperoxidase-C2 (FITC) and Mouse anti CD3 (PE)
1 mL
Ask
MBS570355-02
COMBI IC Reagent: Mouse anti Myeloperoxidase-C2 (FITC) and Mouse anti CD3 (PE)
5x 1 mL
Ask
GIC-214
COMBI IC Reagent: Mouse anti Myeloperoxidase-C2 (FITC) and Mouse anti CD22 (PE)
1 mL
Ask
MBS520693-01
Anti-Human C5a/C5a(desArg)(Neo-Epitope), PE (clone: C17/5), (Mouse IgG1 K)
0.05 mg
Ask
MBS520693-02
Anti-Human C5a/C5a(desArg)(Neo-Epitope), PE (clone: C17/5), (Mouse IgG1 K)
5x 0.05 mg
Ask
FHE03412-01
Anti-Human CD80/B7-1 Antibody (IDEC-114), PE
50 Tests
Ask
FHE03412-02
Anti-Human CD80/B7-1 Antibody (IDEC-114), PE
100 Tests
Ask
FHJ41812-01
Anti-Human SIGLEC12 Antibody (SAA0762), PE
50 Tests
Ask
FHJ41812-02
Anti-Human SIGLEC12 Antibody (SAA0762), PE
100 Tests
Ask
4525-09
Mouse Anti-Porcine Monocyte/Granulocyte-PE
0.1 mg
Ask
MBS673824-01
Mouse Anti-Porcine Monocyte/Granulocyte-PE
0.1 mg
Ask
MBS673824-02
Mouse Anti-Porcine Monocyte/Granulocyte-PE
5x 0.1 mg
Ask
E16FPPMON-100U
PE mouse anti-Porcine Monocyte/Granulocyte
0.1 mg
Ask
E16FHP169-100
PE anti-human CD169 (Sialoadhesin, Siglec-1)
100 tests
Ask
MBS520176-01
Anti-Mouse CD49d, PE (Clone R1-2) (rat IgG2b)
0.05 mg
Ask
MBS520176-02
Anti-Mouse CD49d, PE (Clone R1-2) (rat IgG2b)
0.3 mg
Ask
MBS520176-03
Anti-Mouse CD49d, PE (Clone R1-2) (rat IgG2b)
5x 0.3 mg
Ask
MBS520251-01
Anti-Mouse CD90, PE (Clone IBL-1) (rat IgG1)
0.05 mg
Ask
MBS520251-02
Anti-Mouse CD90, PE (Clone IBL-1) (rat IgG1)
0.3 mg
Ask
MBS520251-03
Anti-Mouse CD90, PE (Clone IBL-1) (rat IgG1)
5x 0.3 mg
Ask
MBS524581-01
Anti-Mouse CD117, PE (Clone 2B8)(rat IgG2b)
0.1 mg
Ask
MBS524581-02
Anti-Mouse CD117, PE (Clone 2B8)(rat IgG2b)
5x 0.1 mg
Ask
MCD004-PE
Anti-Mouse CD4 PE (Clone CT-CD4) (rat IgG2a)
100 Tests
Ask
E16FHP169-025
PE anti-human CD169 (Sialoadhesin, Siglec-1)
25 tests
Ask
MBS520314-01
Anti-Mouse Granulocytes (Gr-1), PE (Clone RB6-8C5) (rat IgG2b)
0.05 mg
Ask
MBS520314-02
Anti-Mouse Granulocytes (Gr-1), PE (Clone RB6-8C5) (rat IgG2b)
5x 0.05 mg
Ask
MBS520121-01
Anti-Mouse CD40, PE (Clone 3/23) (rat IgG2a)
0.05 mg
Ask
MBS520121-02
Anti-Mouse CD40, PE (Clone 3/23) (rat IgG2a)
0.3 mg
Ask
MBS520121-03
Anti-Mouse CD40, PE (Clone 3/23) (rat IgG2a)
5x 0.3 mg
Ask
MBS520134-01
Anti-Mouse CD44, PE (Clone KM81) (rat IgG2a)
0.05 mg
Ask
MBS520134-02
Anti-Mouse CD44, PE (Clone KM81) (rat IgG2a)
0.3 mg
Ask
MBS520134-03
Anti-Mouse CD44, PE (Clone KM81) (rat IgG2a)
5x 0.3 mg
Ask
MBS520830-01
Anti-Mouse CD37, PE, (Clone: KT37) (Rat IgG2a)
0.05 mg
Ask
MBS520830-02
Anti-Mouse CD37, PE, (Clone: KT37) (Rat IgG2a)
5x 0.05 mg
Ask
MCD0902-PE
Anti-Mouse CD90, PE (Clone IBL-1) (rat IgG1)
100 Tests
Ask
MCD134-PE
Anti-Mouse CD134, PE (Clone OX-86)(rat IgG1)
100 Tests
Ask
MCD044-PE
Anti-Mouse CD44, PE (Clone KM81) (rat IgG2a)
100 Tests
Ask
FHJ95312-01
Anti-Human CD371/CLEC12A Antibody (SAA0102), PE
50 Tests
Ask
FHJ95312-02
Anti-Human CD371/CLEC12A Antibody (SAA0102), PE
100 Tests
Ask
FHK13712-01
Anti-Human SIGLEC15/CD33L3 Antibody (A9E8), PE
50 Tests
Ask
FHK13712-02
Anti-Human SIGLEC15/CD33L3 Antibody (A9E8), PE
100 Tests
Ask
MCD049D-PE
Anti-Mouse CD49d, PE (Clone R1-2) (rat IgG2b)
100 Tests
Ask
MBS520637-01
Anti-Mouse CD5, PE (Clone 53-7.3) (rat IgG2a)
0.05 mg
Ask
MBS520637-02
Anti-Mouse CD5, PE (Clone 53-7.3) (rat IgG2a)
5x 0.05 mg
Ask
MBS520048-01
Anti-Mouse CD134, PE (Clone OX-86) (rat IgG1)
0.05 mg
Ask
MBS520048-02
Anti-Mouse CD134, PE (Clone OX-86) (rat IgG1)
0.3 mg
Ask
MBS520048-03
Anti-Mouse CD134, PE (Clone OX-86) (rat IgG1)
5x 0.3 mg
Ask
MBS520115-01
Anti-Mouse CD4 PE (Clone CT-CD4) (rat IgG2a)
0.05 mg
Ask
MBS520115-02
Anti-Mouse CD4 PE (Clone CT-CD4) (rat IgG2a)
0.3 mg
Ask
MBS520115-03
Anti-Mouse CD4 PE (Clone CT-CD4) (rat IgG2a)
5x 0.3 mg
Ask
MCD040-PE
Anti-Mouse CD40, PE (Clone 3/23) (rat IgG2b)
100 Tests
Ask
FHK13722-01
Anti-Human SIGLEC15/CD33L3 Antibody (25E9#), PE
50 Tests
Ask
FHK13722-02
Anti-Human SIGLEC15/CD33L3 Antibody (25E9#), PE
100 Tests
Ask
MBS520026-01
Anti-Mouse CD117, PE (Clone ACK4) (rat IgG2a)
0.05 mg
Ask
MBS520026-02
Anti-Mouse CD117, PE (Clone ACK4) (rat IgG2a)
0.3 mg
Ask
MBS520026-03
Anti-Mouse CD117, PE (Clone ACK4) (rat IgG2a)
5x 0.3 mg
Ask
MBS520148-01
Anti-Mouse CD45, PE (Clone IBL-5/25) (rat IgG1)
0.05 mg
Ask
MBS520148-02
Anti-Mouse CD45, PE (Clone IBL-5/25) (rat IgG1)
0.3 mg
Ask
MBS520148-03
Anti-Mouse CD45, PE (Clone IBL-5/25) (rat IgG1)
5x 0.3 mg
Ask
MBS520168-01
Anti-Mouse CD45RC, PE (Clone IBL-8) (rat IgG1)
0.05 mg
Ask
MBS520168-02
Anti-Mouse CD45RC, PE (Clone IBL-8) (rat IgG1)
0.3 mg
Ask
MBS520168-03
Anti-Mouse CD45RC, PE (Clone IBL-8) (rat IgG1)
5x 0.3 mg
Ask
MBS520610-01
Anti-Mouse CD200, PE (Clone OX90) (rat IgG2a)
0.05 mg
Ask
MBS520610-02
Anti-Mouse CD200, PE (Clone OX90) (rat IgG2a)
5x 0.05 mg
Ask
MCD045-PE
Anti-Mouse CD45, PE (Clone IBL-5/25) (rat IgG1)
100 Tests
Ask
MCD062L-PE
Anti-Mouse CD62L, PE (Clone MEL-14) (rat IgG2a)
100 Tests
Ask
MCD045RB-PE
Anti-Mouse CD45RB, PE (Clone 16A) (rat IgG2a)
100 Tests
Ask
MCD045RC-PE
Anti-Mouse CD45RC, PE (Clone IBL-8) (rat IgG1)
100 Tests
Ask
FHK27712-01
Anti-Human KLRG1/CLEC15A Antibody (SAA0508), PE
50 Tests
Ask
FHK27712-02
Anti-Human KLRG1/CLEC15A Antibody (SAA0508), PE
100 Tests
Ask
MBS520114-01
Anti-Mouse CD4 PE (Clone YTS 191.1) (rat IgG2b)
0.05 mg
Ask
MBS520114-02
Anti-Mouse CD4 PE (Clone YTS 191.1) (rat IgG2b)
0.3 mg
Ask
MBS520114-03
Anti-Mouse CD4 PE (Clone YTS 191.1) (rat IgG2b)
5x 0.3 mg
Ask
MBS520135-01
Anti-Mouse CD44, PE (Clone IM7.8.1) (rat IgG2b)
0.05 mg
Ask
MBS520135-02
Anti-Mouse CD44, PE (Clone IM7.8.1) (rat IgG2b)
0.3 mg
Ask
MBS520135-03
Anti-Mouse CD44, PE (Clone IM7.8.1) (rat IgG2b)
5x 0.3 mg
Ask