All the Arabian camel (Camelus dromedarius) IGHV genes belong to a single subgroup IGHV1. This subgroup corresponds to the human IGHV3 subgroup (1).

IGHV
subgroup		 IGHV
gene name		 Fct R T Pr Reference sequences Accession numbers Sequences from the literature
1 IGHV1S1 F cvh1 AF000603 [1]
[F] cvhp01 AJ245149 [2](2)(3) °
[F] cvhp13 AJ245161 [2](2)(3) °
[F] cvhp15 AJ245163 [2](2)(3) °
IGHV1S2 [F] cvhp03 AJ245151 [2](2)(3) °
IGHV1S3 [F] cvhp04 AJ245152 [2](2)(3) °
IGHV1S4 [F] cvhp05 AJ245153 [2](2)(3) °
IGHV1S5 [F] cvhp06 AJ245154 [2](2)(3) °
IGHV1S6 [F] cvhp07 AJ245155 [2](2)(3) °
IGHV1S7 [F] cvhp09 AJ245157 [2](2)(3) °
IGHV1S8 [F] cvhp10 AJ245158 [2](2)(3) °
IGHV1S9 [F] cvhp11 AJ245159 [2](2)(3) °
IGHV1S10 [F] cvhp12 AJ245160 [2](2)(3) °
IGHV1S11 [F] cvhp16 AJ245164 [2](2)(3) °
IGHV1S12 [F] cvhp17 AJ245165 [2](2)(3) °
[F] cvhp18 AJ245166 [2](2)(3) °
IGHV1S13 [F] cvhp19 AJ245167 [2](2)(3) °
IGHV1S14 [F] cvhp20 AJ245168 [2](2)(3) °
IGHV1S15 [F] cvhp22 AJ245170 [2](2)(3) °
IGHV1S16 [F] cvhp23 AJ245171 [2](2)(3) °
IGHV1S17 [F] cvhp25 AJ245173 [2](2)(3) °
IGHV1S18 [F] cvhp26 AJ245174 [2](2)(3) °
IGHV1S19 [F] cvhp08 AJ245156 [2](2)(3) °
IGHV1S20 [F] cvhp29 AJ245177 [2](2)(3) °
IGHV1S21 [F] cvhp30 AJ245178 [2](2)(3) °
IGHV1S22 [F] cvhp35 AJ245183 [2](2)(3) °
IGHV1S23 [F] cvhp37 AJ245185 [2](2)(3) °
IGHV1S24 [F] cvhp38 AJ245186 [2](2)(3) °
IGHV1S25 [F] cvhp39 AJ245187 [2](2)(3) °
IGHV1S26 [F] cvhp41 AJ245189 [2](2)(3) °
IGHV1S27 [F] cvhp43 AJ245191 [2](2)(3) °
IGHV1S28 [F] cvhp44 AJ245192 [2](2)(3) °
IGHV1S29 [F] cvhp45 AJ245193 [2](2)(3) °
IGHV1S30 [F] cvhp46 AJ245194 [2](2)(3) °
IGHV1S31 [F] cvhp47 AJ245195 [2](2)(3) °
IGHV1S32 [F] cvhp31 AJ245179 [2](2)(3) °
IGHV1S33 [F] cvhp32 AJ245180 [2](2)(3) °
IGHV1S34 [F] cvhp34 AJ245182 [2](2)(3) °
IGHV1S35 [F] cvhp42 AJ245190 [2](2)(3) °
IGHV1S36 [F] cvhp48 AJ245196 [2](2)(3) °
IGHV1S37 [F] cvhp49 AJ245197 [2](2)(3) °
IGHV1S38 [F] cvhp33 AJ245181 [2](2)(3) °
IGHV1S39 [F] cvhp50 AJ245198 [2](2)(3) °
IGHV1S40 [P](4) cvhp51 AJ245199 [2](2)(3) °
IGHV1S41 [P](5) cvhp52 AJ245200 [2](2)(3) °
IGHV1S42 [F] cvhhp42 AJ245148 [2](2)(3) °
IGHV1S43 [F] cvhhp09 AJ245115 [2](2)(3) °
IGHV1S44 [F] cvhhp12 AJ245118 [2](2)(3) °
IGHV1S45 [F] cvhhp08 AJ245114 [2](2)(3) °
IGHV1S46 [F] cvhhp10 AJ245116 [2](2)(3) °
IGHV1S47 [F] cvhhp11 AJ245117 [2](2)(3) °
IGHV1S48 [F] cvhhp29 AJ245135 [2](2)(3) °
IGHV1S49 [F] cvhhp31 AJ245137 [2](2)(3) °
IGHV1S50 [F] cvhhp28 AJ245134 [2](2)(3) °
IGHV1S51 [F] cvhhp06 AJ245112 [2](2)(3) °
IGHV1S52 [F] cvhhp07 AJ245113 [2](2)(3) °
IGHV1S53 [F] cvhhp16 AJ245122 [2](2)(3) °
IGHV1S54 [F] cvhhp18 AJ245124 [2](2)(3) °
IGHV1S55 [F] cvhhp20 AJ245126 [2](2)(3) °
IGHV1S56 [F] cvhhp21 AJ245127 [2](2)(3) °
IGHV1S57 [F] cvhhp22 AJ245128 [2](2)(3) °
IGHV1S58 [F] cvhhp26 AJ245132 [2](2)(3) °
IGHV1S59 [F] cvhhp27 AJ245133 [2](2)(3) °
IGHV1S60 [F] cvhhp13 AJ245119 [2](2)(3) °
IGHV1S61 [F] cvhhp23 AJ245129 [2](2)(3) °
IGHV1S62 [F] cvhhp24 AJ245130 [2](2)(3) °
IGHV1S63 [F] cvhhp25 AJ245131 [2](2)(3) °
IGHV1S64 [F] cvhhp32 AJ245138 [2](2)(3) °
IGHV1S65 [F] cvhhp30 AJ245136 [2](2)(3) °
IGHV1S66 [F] cvhhp34 AJ245140 [2](2)(3) °
IGHV1S67 [F] cvhhp33 AJ245139 [2](2)(3) °
IGHV1S68 [F] cvhhp35 AJ245141 [2](2)(3) °
IGHV1S69 [F] cvhhp36 AJ245142 [2](2)(3) °
IGHV1S70 [F] cvhhp37 AJ245143 [2](2)(3) °
IGHV1S71 [F] cvhhp38 AJ245144 [2](2)(3) °
IGHV1S72 F cvhhc1 AF000604 [1]
[F] cvhhp01 AJ245107 [2](2)(3) °
IGHV1S73 [F] cvhhp04 AJ245110 [2](2)(3) °
IGHV1S74 [F] cvhhp05 AJ245111 [2](2)(3) °

°: genomic DNA, but not known as being germline or rearranged.

IMGT notes:
(1) The Arabian camel (Camelus dromedarius) IGHV1 genes belong to two sets based on amino acid sequences and on the presence or lack of light chain in the antibodies.
The first set, which corresponds to the IGHV1S1 to IGHV1S41, is used in conventional tetrameric IgG1.
The second set, which corresponds to IGHV1S42 to IGHV1S74, is expressed in heavy gamma 2 and gamma 3 chains both characterized by the absence of the CH1 domain, and therefore not associated with light chains (see Gene and allele table: Arabian camel (Camelus dromedarius) IGHC).
Four FR2-IMGT positions (42, 49, 50 and 52 in the IMGT unique numbering) show amino acid differences which are characteristic of each set:

FR2-IMGT amino acid positions 42 49 50 52
IGHV1S1 to IGHV1S41 V G L W
IGHV1S42 to IGHV1S74 F,Y E,Q C,R F,G,L,W

(2) Genomic data are needed to confirm that the sequences AJ245107-AJ245200 are from germline genomic DNA. Indeed the PCR amplification was done with a 3' primer which encompasses the end of the FR3-IMGT (AA 97 to 104).
(3) V-REGION is partial: no CDR3-IMGT.
(4) In frame STOP-CODON (positions 79-81) at codon 27 in CDR2-IMGT .
(5) DELETION of one nucleotide (at position 267 in the IMGT unique numbering) leading to a frameshift in FR3-IMGT.
References:
[1] Nguyen, V.K. et al., J. Mol. Biol., 275, 413-418 (1998).
[2] Nguyen, V.K. et al., EMBO J., 19, 921-930 (2000).