complement component 4B (Chido blood group) (C4B) - 1049 nt intron 31 reference sequence

(intronic numbering for coding DNA Reference Sequence)
         .         .         .         .         .         .  g.20767
gtgagggccagggaaggggtggggccaggcactggtggaggagagggtgtggagtgagag  c.4137+60

         .         .         .         .         .         .  g.20827
gcctgtgggcagaggcacatggtccggggaaggaggcagacacctcagggttggtgtccc  c.4137+120

         .         .         .         .         .         .  g.20887
gtgcttccgtcctgggtgtttttccccctgcttgctttcgcttgctctccccatctctgg  c.4137+180

         .         .         .         .         .         .  g.20947
gtacctgttgtttcctttacccgcctcagtgctggtggctccgaatcccactcctcagcc  c.4137+240

         .         .         .         .         .         .  g.21007
caggcctcttccctgaaccatgggccccactcgtcccactcccacagcacctcagacgag  c.4137+300

         .         .         .         .         .         .  g.21067
gcatgtcccaaagcccttcttcattctgtgtctcttgtctggctggtgggagcccctccc  c.4137+360

         .         .         .         .         .         .  g.21127
agccaggagcccagccactactctagaggccgtgttagtggcccctctcccaagcctgtc  c.4137+420

         .         .         .         .         .         .  g.21187
cttatgtccctagtgactcctcctctgctcccctgctgcctgtggcccttggtgctgcat  c.4137+480

         .         .         .         .       g.21232
cctagattctgtgctgagacggccttctccctacctggaacttct  c.4137+525

--------------------- middle of intron ---------------------
    g.21233         .         .         .         .           g.21276
    c.4138-524  ctctacctcctgtctcccctgtctgatccactgtccacacggca  c.4138-481

.         .         .         .         .         .           g.21336
gtgacactgaccttccaaaagccccagccagatcagccttggggaaaagtcactccccgc  c.4138-421

.         .         .         .         .         .           g.21396
tgcccacggctcagatggctgggcctctgcccacccctccggccagacagctctccttgt  c.4138-361

.         .         .         .         .         .           g.21456
ctacacagatccccttgcctttcctgtccttccctgcttcttggcccacaggacaagctc  c.4138-301

.         .         .         .         .         .           g.21516
tttcttctccttcaagccttggccagaagcctttcctgagcttttcagtccagcctcttc  c.4138-241

.         .         .         .         .         .           g.21576
ccagcacagtctggagtgttggcctctgggggcaggcccctgcttctttacctctctgtc  c.4138-181

.         .         .         .         .         .           g.21636
tcgcctgacgcctgtggcgaatgtggtgccactcgtgtgtgtggactgtgcagtgacggg  c.4138-121

.         .         .         .         .         .           g.21696
gaggaaaaggggctgaaggcctcaaatcctgtagcccagggagatgcccttaggtatggc  c.4138-61

.         .         .         .         .         .           g.21756
accagagaggtctgtggcctcacatgtcccacgtcctctccctgccccttgctgagccag  c.4138-1