From 6d1ac60c48ac355808d3b0ee18229aab662d72b2 Mon Sep 17 00:00:00 2001
From: Eric Coissac <eric.coissac@metabarcoding.org>
Date: Fri, 1 Sep 2023 09:40:02 +0200
Subject: [PATCH] Convert first nucleotide of sequence to lower case in fasta
 reader

Former-commit-id: 856bb3a39a4f1143a34b1f8b4d8d12b0151c0c3e
---
 pkg/obiformats/fastaseq_read.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pkg/obiformats/fastaseq_read.go b/pkg/obiformats/fastaseq_read.go
index eb6e9cf..c902857 100644
--- a/pkg/obiformats/fastaseq_read.go
+++ b/pkg/obiformats/fastaseq_read.go
@@ -219,6 +219,9 @@ func ParseFastaChunk(source string, ch FastxChunk) *obiiter.BioSequenceBatch {
 			if !is_end_of_line {
 				// Beginning of sequence
 				start = i
+				if C >= 'A' && C <= 'Z' {
+					ch.Bytes[current] = C + 'a' - 'A'
+				}
 				current = i + 1
 				state = 6
 			}